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Finding the Fourth Proportional to 80,618.76, 120,876.30 and 38,476.08

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Solution

The fourth proportional to 80,618.76, 120,876.30 and 38,476.08 is: 57,689.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,618.76 : 120,876.30 = 38,476.08 : x
  2. Step 2: Convert to fraction form
    80,618.76/120,876.30 = 38,476.08/x
  3. Step 3: Cross multiply
    80,618.76x = 120,876.30 × 38,476.08
  4. Step 4: Simplify right side
    80,618.76x = 4,650,846,188.90
  5. Step 5: Solve for x
    x = 4,650,846,188.90/80,618.76
  6. Step 6: Final answer
    x = 57,689.38

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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.