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Finding the Fourth Proportional to 100,891.53, 139,233.90 and 62,672.01

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Solution

The fourth proportional to 100,891.53, 139,233.90 and 62,672.01 is: 86,489.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,891.53 : 139,233.90 = 62,672.01 : x
  2. Step 2: Convert to fraction form
    100,891.53/139,233.90 = 62,672.01/x
  3. Step 3: Cross multiply
    100,891.53x = 139,233.90 × 62,672.01
  4. Step 4: Simplify right side
    100,891.53x = 8,726,068,373.14
  5. Step 5: Solve for x
    x = 8,726,068,373.14/100,891.53
  6. Step 6: Final answer
    x = 86,489.60

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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.