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Finding the Fourth Proportional to 89,245.85, 133,903.78 and 39,290.90

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Solution

The fourth proportional to 89,245.85, 133,903.78 and 39,290.90 is: 58,951.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,245.85 : 133,903.78 = 39,290.90 : x
  2. Step 2: Convert to fraction form
    89,245.85/133,903.78 = 39,290.90/x
  3. Step 3: Cross multiply
    89,245.85x = 133,903.78 × 39,290.90
  4. Step 4: Simplify right side
    89,245.85x = 5,261,199,859.47
  5. Step 5: Solve for x
    x = 5,261,199,859.47/89,245.85
  6. Step 6: Final answer
    x = 58,951.76

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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.