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Finding the Fourth Proportional to 81,656.89, 122,502.85 and 28,350.56

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Solution

The fourth proportional to 81,656.89, 122,502.85 and 28,350.56 is: 42,531.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,656.89 : 122,502.85 = 28,350.56 : x
  2. Step 2: Convert to fraction form
    81,656.89/122,502.85 = 28,350.56/x
  3. Step 3: Cross multiply
    81,656.89x = 122,502.85 × 28,350.56
  4. Step 4: Simplify right side
    81,656.89x = 3,473,023,945.40
  5. Step 5: Solve for x
    x = 3,473,023,945.40/81,656.89
  6. Step 6: Final answer
    x = 42,531.91

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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.