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Finding the Fourth Proportional to 90,000.20, 135,000.30 and 55,008.20

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Solution

The fourth proportional to 90,000.20, 135,000.30 and 55,008.20 is: 82,512.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,000.20 : 135,000.30 = 55,008.20 : x
  2. Step 2: Convert to fraction form
    90,000.20/135,000.30 = 55,008.20/x
  3. Step 3: Cross multiply
    90,000.20x = 135,000.30 × 55,008.20
  4. Step 4: Simplify right side
    90,000.20x = 7,426,123,502.46
  5. Step 5: Solve for x
    x = 7,426,123,502.46/90,000.20
  6. Step 6: Final answer
    x = 82,512.30

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Similar ratio
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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.