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Finding the Fourth Proportional to 125,176.52, 172,750.52 and 71,478.79

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Solution

The fourth proportional to 125,176.52, 172,750.52 and 71,478.79 is: 98,644.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,176.52 : 172,750.52 = 71,478.79 : x
  2. Step 2: Convert to fraction form
    125,176.52/172,750.52 = 71,478.79/x
  3. Step 3: Cross multiply
    125,176.52x = 172,750.52 × 71,478.79
  4. Step 4: Simplify right side
    125,176.52x = 12,347,998,141.47
  5. Step 5: Solve for x
    x = 12,347,998,141.47/125,176.52
  6. Step 6: Final answer
    x = 98,644.68

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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.