Home / 91,123.20-136,684.80-82,375.20

Finding the Fourth Proportional to 91,123.20, 136,684.80 and 82,375.20

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Solution

The fourth proportional to 91,123.20, 136,684.80 and 82,375.20 is: 123,562.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,123.20 : 136,684.80 = 82,375.20 : x
  2. Step 2: Convert to fraction form
    91,123.20/136,684.80 = 82,375.20/x
  3. Step 3: Cross multiply
    91,123.20x = 136,684.80 × 82,375.20
  4. Step 4: Simplify right side
    91,123.20x = 11,259,437,736.96
  5. Step 5: Solve for x
    x = 11,259,437,736.96/91,123.20
  6. Step 6: Final answer
    x = 123,562.80

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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.