Home / 85,501.30-128,106.15-70,629.70

Finding the Fourth Proportional to 85,501.30, 128,106.15 and 70,629.70

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Solution

The fourth proportional to 85,501.30, 128,106.15 and 70,629.70 is: 105,824.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,501.30 : 128,106.15 = 70,629.70 : x
  2. Step 2: Convert to fraction form
    85,501.30/128,106.15 = 70,629.70/x
  3. Step 3: Cross multiply
    85,501.30x = 128,106.15 × 70,629.70
  4. Step 4: Simplify right side
    85,501.30x = 9,048,098,942.66
  5. Step 5: Solve for x
    x = 9,048,098,942.66/85,501.30
  6. Step 6: Final answer
    x = 105,824.11

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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.