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Finding the Fourth Proportional to 84,672.52, 127,022.82 and 28,517.38

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Solution

The fourth proportional to 84,672.52, 127,022.82 and 28,517.38 is: 42,780.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,672.52 : 127,022.82 = 28,517.38 : x
  2. Step 2: Convert to fraction form
    84,672.52/127,022.82 = 28,517.38/x
  3. Step 3: Cross multiply
    84,672.52x = 127,022.82 × 28,517.38
  4. Step 4: Simplify right side
    84,672.52x = 3,622,358,026.61
  5. Step 5: Solve for x
    x = 3,622,358,026.61/84,672.52
  6. Step 6: Final answer
    x = 42,780.80

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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.