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Finding the Fourth Proportional to 80,672.40, 120,992.40 and 38,552.40

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Solution

The fourth proportional to 80,672.40, 120,992.40 and 38,552.40 is: 57,820.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,672.40 : 120,992.40 = 38,552.40 : x
  2. Step 2: Convert to fraction form
    80,672.40/120,992.40 = 38,552.40/x
  3. Step 3: Cross multiply
    80,672.40x = 120,992.40 × 38,552.40
  4. Step 4: Simplify right side
    80,672.40x = 4,664,547,401.76
  5. Step 5: Solve for x
    x = 4,664,547,401.76/80,672.40
  6. Step 6: Final answer
    x = 57,820.86

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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.