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Finding the Fourth Proportional to 81,076.01, 121,620.49 and 28,497.29

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Solution

The fourth proportional to 81,076.01, 121,620.49 and 28,497.29 is: 42,748.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,076.01 : 121,620.49 = 28,497.29 : x
  2. Step 2: Convert to fraction form
    81,076.01/121,620.49 = 28,497.29/x
  3. Step 3: Cross multiply
    81,076.01x = 121,620.49 × 28,497.29
  4. Step 4: Simplify right side
    81,076.01x = 3,465,853,694.13
  5. Step 5: Solve for x
    x = 3,465,853,694.13/81,076.01
  6. Step 6: Final answer
    x = 42,748.21

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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.