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Finding the Fourth Proportional to 172,388.55, 258,102.90 and 87,966.30

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Solution

The fourth proportional to 172,388.55, 258,102.90 and 87,966.30 is: 131,704.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,388.55 : 258,102.90 = 87,966.30 : x
  2. Step 2: Convert to fraction form
    172,388.55/258,102.90 = 87,966.30/x
  3. Step 3: Cross multiply
    172,388.55x = 258,102.90 × 87,966.30
  4. Step 4: Simplify right side
    172,388.55x = 22,704,357,132.27
  5. Step 5: Solve for x
    x = 22,704,357,132.27/172,388.55
  6. Step 6: Final answer
    x = 131,704.55

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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.