Home / 215,581.60-323,257.20-90,781.60

Finding the Fourth Proportional to 215,581.60, 323,257.20 and 90,781.60

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Solution

The fourth proportional to 215,581.60, 323,257.20 and 90,781.60 is: 136,123.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,581.60 : 323,257.20 = 90,781.60 : x
  2. Step 2: Convert to fraction form
    215,581.60/323,257.20 = 90,781.60/x
  3. Step 3: Cross multiply
    215,581.60x = 323,257.20 × 90,781.60
  4. Step 4: Simplify right side
    215,581.60x = 29,345,805,827.52
  5. Step 5: Solve for x
    x = 29,345,805,827.52/215,581.60
  6. Step 6: Final answer
    x = 136,123.89

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1.5x scale

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.