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Finding the Fourth Proportional to 172,147.76, 257,742.68 and 87,725.92

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Solution

The fourth proportional to 172,147.76, 257,742.68 and 87,725.92 is: 131,344.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,147.76 : 257,742.68 = 87,725.92 : x
  2. Step 2: Convert to fraction form
    172,147.76/257,742.68 = 87,725.92/x
  3. Step 3: Cross multiply
    172,147.76x = 257,742.68 × 87,725.92
  4. Step 4: Simplify right side
    172,147.76x = 22,610,713,726.27
  5. Step 5: Solve for x
    x = 22,610,713,726.27/172,147.76
  6. Step 6: Final answer
    x = 131,344.80

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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.