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Finding the Fourth Proportional to 80,672.60, 121,008.90 and 45,680.60

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Solution

The fourth proportional to 80,672.60, 121,008.90 and 45,680.60 is: 68,520.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,672.60 : 121,008.90 = 45,680.60 : x
  2. Step 2: Convert to fraction form
    80,672.60/121,008.90 = 45,680.60/x
  3. Step 3: Cross multiply
    80,672.60x = 121,008.90 × 45,680.60
  4. Step 4: Simplify right side
    80,672.60x = 5,527,759,157.34
  5. Step 5: Solve for x
    x = 5,527,759,157.34/80,672.60
  6. Step 6: Final answer
    x = 68,520.90

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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.