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Finding the Fourth Proportional to 80,791, 121,187.10 and 28,200.53

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Solution

The fourth proportional to 80,791, 121,187.10 and 28,200.53 is: 42,301.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,791 : 121,187.10 = 28,200.53 : x
  2. Step 2: Convert to fraction form
    80,791/121,187.10 = 28,200.53/x
  3. Step 3: Cross multiply
    80,791x = 121,187.10 × 28,200.53
  4. Step 4: Simplify right side
    80,791x = 3,417,540,449.16
  5. Step 5: Solve for x
    x = 3,417,540,449.16/80,791
  6. Step 6: Final answer
    x = 42,301.00

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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.