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Finding the Fourth Proportional to 54,129.70, 81,180.15 and 16,689.70

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Solution

The fourth proportional to 54,129.70, 81,180.15 and 16,689.70 is: 25,030.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,129.70 : 81,180.15 = 16,689.70 : x
  2. Step 2: Convert to fraction form
    54,129.70/81,180.15 = 16,689.70/x
  3. Step 3: Cross multiply
    54,129.70x = 81,180.15 × 16,689.70
  4. Step 4: Simplify right side
    54,129.70x = 1,354,872,349.46
  5. Step 5: Solve for x
    x = 1,354,872,349.46/54,129.70
  6. Step 6: Final answer
    x = 25,030.11

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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.