Home / 138,934.13-208,068.19-71,288.15

Finding the Fourth Proportional to 138,934.13, 208,068.19 and 71,288.15

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Solution

The fourth proportional to 138,934.13, 208,068.19 and 71,288.15 is: 106,761.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,934.13 : 208,068.19 = 71,288.15 : x
  2. Step 2: Convert to fraction form
    138,934.13/208,068.19 = 71,288.15/x
  3. Step 3: Cross multiply
    138,934.13x = 208,068.19 × 71,288.15
  4. Step 4: Simplify right side
    138,934.13x = 14,832,795,120.39
  5. Step 5: Solve for x
    x = 14,832,795,120.39/138,934.13
  6. Step 6: Final answer
    x = 106,761.35

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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.