Home / 90,765.52-135,869.61-82,211.92

Finding the Fourth Proportional to 90,765.52, 135,869.61 and 82,211.92

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Solution

The fourth proportional to 90,765.52, 135,869.61 and 82,211.92 is: 123,065.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,765.52 : 135,869.61 = 82,211.92 : x
  2. Step 2: Convert to fraction form
    90,765.52/135,869.61 = 82,211.92/x
  3. Step 3: Cross multiply
    90,765.52x = 135,869.61 × 82,211.92
  4. Step 4: Simplify right side
    90,765.52x = 11,170,101,507.75
  5. Step 5: Solve for x
    x = 11,170,101,507.75/90,765.52
  6. Step 6: Final answer
    x = 123,065.47

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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.