Home / 80,961.40-121,442.10-72,432.10

Finding the Fourth Proportional to 80,961.40, 121,442.10 and 72,432.10

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Solution

The fourth proportional to 80,961.40, 121,442.10 and 72,432.10 is: 108,648.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,961.40 : 121,442.10 = 72,432.10 : x
  2. Step 2: Convert to fraction form
    80,961.40/121,442.10 = 72,432.10/x
  3. Step 3: Cross multiply
    80,961.40x = 121,442.10 × 72,432.10
  4. Step 4: Simplify right side
    80,961.40x = 8,796,306,331.41
  5. Step 5: Solve for x
    x = 8,796,306,331.41/80,961.40
  6. Step 6: Final answer
    x = 108,648.15

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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.