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Finding the Fourth Proportional to 125,347.56, 172,978.02 and 71,631.96

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Solution

The fourth proportional to 125,347.56, 172,978.02 and 71,631.96 is: 98,851.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,347.56 : 172,978.02 = 71,631.96 : x
  2. Step 2: Convert to fraction form
    125,347.56/172,978.02 = 71,631.96/x
  3. Step 3: Cross multiply
    125,347.56x = 172,978.02 × 71,631.96
  4. Step 4: Simplify right side
    125,347.56x = 12,390,754,609.52
  5. Step 5: Solve for x
    x = 12,390,754,609.52/125,347.56
  6. Step 6: Final answer
    x = 98,851.18

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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.