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Finding the Fourth Proportional to 125,081.43, 172,609.18 and 69,891.20

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Solution

The fourth proportional to 125,081.43, 172,609.18 and 69,891.20 is: 96,448.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,081.43 : 172,609.18 = 69,891.20 : x
  2. Step 2: Convert to fraction form
    125,081.43/172,609.18 = 69,891.20/x
  3. Step 3: Cross multiply
    125,081.43x = 172,609.18 × 69,891.20
  4. Step 4: Simplify right side
    125,081.43x = 12,063,862,721.22
  5. Step 5: Solve for x
    x = 12,063,862,721.22/125,081.43
  6. Step 6: Final answer
    x = 96,448.07

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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.