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Finding the Fourth Proportional to 80,691.96, 121,038.48 and 28,102.44

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Solution

The fourth proportional to 80,691.96, 121,038.48 and 28,102.44 is: 42,153.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,691.96 : 121,038.48 = 28,102.44 : x
  2. Step 2: Convert to fraction form
    80,691.96/121,038.48 = 28,102.44/x
  3. Step 3: Cross multiply
    80,691.96x = 121,038.48 × 28,102.44
  4. Step 4: Simplify right side
    80,691.96x = 3,401,476,621.89
  5. Step 5: Solve for x
    x = 3,401,476,621.89/80,691.96
  6. Step 6: Final answer
    x = 42,153.85

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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.