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Finding the Fourth Proportional to 125,305.48, 172,905.63 and 71,593.97

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Solution

The fourth proportional to 125,305.48, 172,905.63 and 71,593.97 is: 98,790.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,305.48 : 172,905.63 = 71,593.97 : x
  2. Step 2: Convert to fraction form
    125,305.48/172,905.63 = 71,593.97/x
  3. Step 3: Cross multiply
    125,305.48x = 172,905.63 × 71,593.97
  4. Step 4: Simplify right side
    125,305.48x = 12,379,000,740.33
  5. Step 5: Solve for x
    x = 12,379,000,740.33/125,305.48
  6. Step 6: Final answer
    x = 98,790.58

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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.