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Finding the Fourth Proportional to 67,728.60, 101,447.10 and 56,064.60

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Solution

The fourth proportional to 67,728.60, 101,447.10 and 56,064.60 is: 83,976.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,728.60 : 101,447.10 = 56,064.60 : x
  2. Step 2: Convert to fraction form
    67,728.60/101,447.10 = 56,064.60/x
  3. Step 3: Cross multiply
    67,728.60x = 101,447.10 × 56,064.60
  4. Step 4: Simplify right side
    67,728.60x = 5,687,591,082.66
  5. Step 5: Solve for x
    x = 5,687,591,082.66/67,728.60
  6. Step 6: Final answer
    x = 83,976.21

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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.