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Finding the Fourth Proportional to 172,505.80, 258,687.72 and 65,929.12

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Solution

The fourth proportional to 172,505.80, 258,687.72 and 65,929.12 is: 98,866.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,505.80 : 258,687.72 = 65,929.12 : x
  2. Step 2: Convert to fraction form
    172,505.80/258,687.72 = 65,929.12/x
  3. Step 3: Cross multiply
    172,505.80x = 258,687.72 × 65,929.12
  4. Step 4: Simplify right side
    172,505.80x = 17,055,053,734.41
  5. Step 5: Solve for x
    x = 17,055,053,734.41/172,505.80
  6. Step 6: Final answer
    x = 98,866.55

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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.