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Finding the Fourth Proportional to 90,423.70, 135,597.15 and 43,690.90

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Solution

The fourth proportional to 90,423.70, 135,597.15 and 43,690.90 is: 65,517.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,423.70 : 135,597.15 = 43,690.90 : x
  2. Step 2: Convert to fraction form
    90,423.70/135,597.15 = 43,690.90/x
  3. Step 3: Cross multiply
    90,423.70x = 135,597.15 × 43,690.90
  4. Step 4: Simplify right side
    90,423.70x = 5,924,361,520.94
  5. Step 5: Solve for x
    x = 5,924,361,520.94/90,423.70
  6. Step 6: Final answer
    x = 65,517.80

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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.