Home / 81,781.26-122,475.05-55,406.04

Finding the Fourth Proportional to 81,781.26, 122,475.05 and 55,406.04

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Solution

The fourth proportional to 81,781.26, 122,475.05 and 55,406.04 is: 82,975.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,781.26 : 122,475.05 = 55,406.04 : x
  2. Step 2: Convert to fraction form
    81,781.26/122,475.05 = 55,406.04/x
  3. Step 3: Cross multiply
    81,781.26x = 122,475.05 × 55,406.04
  4. Step 4: Simplify right side
    81,781.26x = 6,785,856,990.76
  5. Step 5: Solve for x
    x = 6,785,856,990.76/81,781.26
  6. Step 6: Final answer
    x = 82,975.70

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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.