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Finding the Fourth Proportional to 137,712.30, 206,568.45 and 95,721.90

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Solution

The fourth proportional to 137,712.30, 206,568.45 and 95,721.90 is: 143,582.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,712.30 : 206,568.45 = 95,721.90 : x
  2. Step 2: Convert to fraction form
    137,712.30/206,568.45 = 95,721.90/x
  3. Step 3: Cross multiply
    137,712.30x = 206,568.45 × 95,721.90
  4. Step 4: Simplify right side
    137,712.30x = 19,773,124,514.06
  5. Step 5: Solve for x
    x = 19,773,124,514.06/137,712.30
  6. Step 6: Final answer
    x = 143,582.85

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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.