Home / 81,701.66-122,572.19-28,385.87

Finding the Fourth Proportional to 81,701.66, 122,572.19 and 28,385.87

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Solution

The fourth proportional to 81,701.66, 122,572.19 and 28,385.87 is: 42,585.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,701.66 : 122,572.19 = 28,385.87 : x
  2. Step 2: Convert to fraction form
    81,701.66/122,572.19 = 28,385.87/x
  3. Step 3: Cross multiply
    81,701.66x = 122,572.19 × 28,385.87
  4. Step 4: Simplify right side
    81,701.66x = 3,479,318,250.96
  5. Step 5: Solve for x
    x = 3,479,318,250.96/81,701.66
  6. Step 6: Final answer
    x = 42,585.65

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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.