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Finding the Fourth Proportional to 84,891.72, 127,293.84 and 38,104.50

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Solution

The fourth proportional to 84,891.72, 127,293.84 and 38,104.50 is: 57,137.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,891.72 : 127,293.84 = 38,104.50 : x
  2. Step 2: Convert to fraction form
    84,891.72/127,293.84 = 38,104.50/x
  3. Step 3: Cross multiply
    84,891.72x = 127,293.84 × 38,104.50
  4. Step 4: Simplify right side
    84,891.72x = 4,850,468,126.28
  5. Step 5: Solve for x
    x = 4,850,468,126.28/84,891.72
  6. Step 6: Final answer
    x = 57,137.12

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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.