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Finding the Fourth Proportional to 80,839.80, 121,259.70 and 36,516.60

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Solution

The fourth proportional to 80,839.80, 121,259.70 and 36,516.60 is: 54,774.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,839.80 : 121,259.70 = 36,516.60 : x
  2. Step 2: Convert to fraction form
    80,839.80/121,259.70 = 36,516.60/x
  3. Step 3: Cross multiply
    80,839.80x = 121,259.70 × 36,516.60
  4. Step 4: Simplify right side
    80,839.80x = 4,427,991,961.02
  5. Step 5: Solve for x
    x = 4,427,991,961.02/80,839.80
  6. Step 6: Final answer
    x = 54,774.90

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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.