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Finding the Fourth Proportional to 172,387.20, 258,605.10 and 54,046.20

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Solution

The fourth proportional to 172,387.20, 258,605.10 and 54,046.20 is: 81,076.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,387.20 : 258,605.10 = 54,046.20 : x
  2. Step 2: Convert to fraction form
    172,387.20/258,605.10 = 54,046.20/x
  3. Step 3: Cross multiply
    172,387.20x = 258,605.10 × 54,046.20
  4. Step 4: Simplify right side
    172,387.20x = 13,976,622,955.62
  5. Step 5: Solve for x
    x = 13,976,622,955.62/172,387.20
  6. Step 6: Final answer
    x = 81,076.92

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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.