Home / 85,477,688,145.20-128,216,532,217.80-71,763,959,428.40

Finding the Fourth Proportional to 85,477,688,145.20, 128,216,532,217.80 and 71,763,959,428.40

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Solution

The fourth proportional to 85,477,688,145.20, 128,216,532,217.80 and 71,763,959,428.40 is: 107,645,939,142.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,477,688,145.20 : 128,216,532,217.80 = 71,763,959,428.40 : x
  2. Step 2: Convert to fraction form
    85,477,688,145.20/128,216,532,217.80 = 71,763,959,428.40/x
  3. Step 3: Cross multiply
    85,477,688,145.20x = 128,216,532,217.80 × 71,763,959,428.40
  4. Step 4: Simplify right side
    85,477,688,145.20x = 9,201,326,016,128,339,673,088
  5. Step 5: Solve for x
    x = 9,201,326,016,128,339,673,088/85,477,688,145.20
  6. Step 6: Final answer
    x = 107,645,939,142.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.