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Finding the Fourth Proportional to 172,236.60, 258,404.31 and 72,345.42

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Solution

The fourth proportional to 172,236.60, 258,404.31 and 72,345.42 is: 108,538.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,236.60 : 258,404.31 = 72,345.42 : x
  2. Step 2: Convert to fraction form
    172,236.60/258,404.31 = 72,345.42/x
  3. Step 3: Cross multiply
    172,236.60x = 258,404.31 × 72,345.42
  4. Step 4: Simplify right side
    172,236.60x = 18,694,368,336.76
  5. Step 5: Solve for x
    x = 18,694,368,336.76/172,236.60
  6. Step 6: Final answer
    x = 108,538.88

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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.