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Finding the Fourth Proportional to 125,114.43, 172,659.03 and 71,398.89

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Solution

The fourth proportional to 125,114.43, 172,659.03 and 71,398.89 is: 98,531.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,114.43 : 172,659.03 = 71,398.89 : x
  2. Step 2: Convert to fraction form
    125,114.43/172,659.03 = 71,398.89/x
  3. Step 3: Cross multiply
    125,114.43x = 172,659.03 × 71,398.89
  4. Step 4: Simplify right side
    125,114.43x = 12,327,663,090.48
  5. Step 5: Solve for x
    x = 12,327,663,090.48/125,114.43
  6. Step 6: Final answer
    x = 98,531.11

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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.