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Finding the Fourth Proportional to 172,551.65, 258,862.47 and 72,711.80

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Solution

The fourth proportional to 172,551.65, 258,862.47 and 72,711.80 is: 109,082.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,551.65 : 258,862.47 = 72,711.80 : x
  2. Step 2: Convert to fraction form
    172,551.65/258,862.47 = 72,711.80/x
  3. Step 3: Cross multiply
    172,551.65x = 258,862.47 × 72,711.80
  4. Step 4: Simplify right side
    172,551.65x = 18,822,354,851.83
  5. Step 5: Solve for x
    x = 18,822,354,851.83/172,551.65
  6. Step 6: Final answer
    x = 109,082.44

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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.