Home / 85,609,984,014.40-128,414,976,021.60-55,856,090,459.20

Finding the Fourth Proportional to 85,609,984,014.40, 128,414,976,021.60 and 55,856,090,459.20

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Solution

The fourth proportional to 85,609,984,014.40, 128,414,976,021.60 and 55,856,090,459.20 is: 83,784,135,688.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,609,984,014.40 : 128,414,976,021.60 = 55,856,090,459.20 : x
  2. Step 2: Convert to fraction form
    85,609,984,014.40/128,414,976,021.60 = 55,856,090,459.20/x
  3. Step 3: Cross multiply
    85,609,984,014.40x = 128,414,976,021.60 × 55,856,090,459.20
  4. Step 4: Simplify right side
    85,609,984,014.40x = 7,172,758,516,978,488,967,168
  5. Step 5: Solve for x
    x = 7,172,758,516,978,488,967,168/85,609,984,014.40
  6. Step 6: Final answer
    x = 83,784,135,688.80

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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.