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Finding the Fourth Proportional to 65,691.72, 90,666.14 and 62,696.53

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Solution

The fourth proportional to 65,691.72, 90,666.14 and 62,696.53 is: 86,532.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,691.72 : 90,666.14 = 62,696.53 : x
  2. Step 2: Convert to fraction form
    65,691.72/90,666.14 = 62,696.53/x
  3. Step 3: Cross multiply
    65,691.72x = 90,666.14 × 62,696.53
  4. Step 4: Simplify right side
    65,691.72x = 5,684,451,599.68
  5. Step 5: Solve for x
    x = 5,684,451,599.68/65,691.72
  6. Step 6: Final answer
    x = 86,532.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.