Home / 91,841.20-137,761.80-80,177.20

Finding the Fourth Proportional to 91,841.20, 137,761.80 and 80,177.20

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Solution

The fourth proportional to 91,841.20, 137,761.80 and 80,177.20 is: 120,265.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,841.20 : 137,761.80 = 80,177.20 : x
  2. Step 2: Convert to fraction form
    91,841.20/137,761.80 = 80,177.20/x
  3. Step 3: Cross multiply
    91,841.20x = 137,761.80 × 80,177.20
  4. Step 4: Simplify right side
    91,841.20x = 11,045,355,390.96
  5. Step 5: Solve for x
    x = 11,045,355,390.96/91,841.20
  6. Step 6: Final answer
    x = 120,265.80

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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.