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Finding the Fourth Proportional to 138,854.59, 208,114.92 and 63,871.39

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Solution

The fourth proportional to 138,854.59, 208,114.92 and 63,871.39 is: 95,730.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,854.59 : 208,114.92 = 63,871.39 : x
  2. Step 2: Convert to fraction form
    138,854.59/208,114.92 = 63,871.39/x
  3. Step 3: Cross multiply
    138,854.59x = 208,114.92 × 63,871.39
  4. Step 4: Simplify right side
    138,854.59x = 13,292,589,220.14
  5. Step 5: Solve for x
    x = 13,292,589,220.14/138,854.59
  6. Step 6: Final answer
    x = 95,730.28

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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.