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Finding the Fourth Proportional to 80,670.28, 120,915.72 and 60,884.68

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Solution

The fourth proportional to 80,670.28, 120,915.72 and 60,884.68 is: 91,259.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,670.28 : 120,915.72 = 60,884.68 : x
  2. Step 2: Convert to fraction form
    80,670.28/120,915.72 = 60,884.68/x
  3. Step 3: Cross multiply
    80,670.28x = 120,915.72 × 60,884.68
  4. Step 4: Simplify right side
    80,670.28x = 7,361,914,919.17
  5. Step 5: Solve for x
    x = 7,361,914,919.17/80,670.28
  6. Step 6: Final answer
    x = 91,259.32

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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.