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Finding the Fourth Proportional to 90,492.85, 135,004.49 and 85,593.97

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Solution

The fourth proportional to 90,492.85, 135,004.49 and 85,593.97 is: 127,695.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,492.85 : 135,004.49 = 85,593.97 : x
  2. Step 2: Convert to fraction form
    90,492.85/135,004.49 = 85,593.97/x
  3. Step 3: Cross multiply
    90,492.85x = 135,004.49 × 85,593.97
  4. Step 4: Simplify right side
    90,492.85x = 11,555,569,591.90
  5. Step 5: Solve for x
    x = 11,555,569,591.90/90,492.85
  6. Step 6: Final answer
    x = 127,695.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.