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Finding the Fourth Proportional to 91,481.76, 137,080.90 and 63,456.28

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Solution

The fourth proportional to 91,481.76, 137,080.90 and 63,456.28 is: 95,086.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,481.76 : 137,080.90 = 63,456.28 : x
  2. Step 2: Convert to fraction form
    91,481.76/137,080.90 = 63,456.28/x
  3. Step 3: Cross multiply
    91,481.76x = 137,080.90 × 63,456.28
  4. Step 4: Simplify right side
    91,481.76x = 8,698,643,973.05
  5. Step 5: Solve for x
    x = 8,698,643,973.05/91,481.76
  6. Step 6: Final answer
    x = 95,086.10

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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.