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Finding the Fourth Proportional to 138,800.97, 208,287.54 and 63,931.74

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Solution

The fourth proportional to 138,800.97, 208,287.54 and 63,931.74 is: 95,937.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,800.97 : 208,287.54 = 63,931.74 : x
  2. Step 2: Convert to fraction form
    138,800.97/208,287.54 = 63,931.74/x
  3. Step 3: Cross multiply
    138,800.97x = 208,287.54 × 63,931.74
  4. Step 4: Simplify right side
    138,800.97x = 13,316,184,852.52
  5. Step 5: Solve for x
    x = 13,316,184,852.52/138,800.97
  6. Step 6: Final answer
    x = 95,937.26

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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.