Home / 90,630.30-135,945.45-82,319.70

Finding the Fourth Proportional to 90,630.30, 135,945.45 and 82,319.70

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Solution

The fourth proportional to 90,630.30, 135,945.45 and 82,319.70 is: 123,479.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,630.30 : 135,945.45 = 82,319.70 : x
  2. Step 2: Convert to fraction form
    90,630.30/135,945.45 = 82,319.70/x
  3. Step 3: Cross multiply
    90,630.30x = 135,945.45 × 82,319.70
  4. Step 4: Simplify right side
    90,630.30x = 11,190,988,660.37
  5. Step 5: Solve for x
    x = 11,190,988,660.37/90,630.30
  6. Step 6: Final answer
    x = 123,479.55

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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.