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Finding the Fourth Proportional to 80,648.49, 120,881.49 and 40,603.85

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Solution

The fourth proportional to 80,648.49, 120,881.49 and 40,603.85 is: 60,859.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,648.49 : 120,881.49 = 40,603.85 : x
  2. Step 2: Convert to fraction form
    80,648.49/120,881.49 = 40,603.85/x
  3. Step 3: Cross multiply
    80,648.49x = 120,881.49 × 40,603.85
  4. Step 4: Simplify right side
    80,648.49x = 4,908,253,283.33
  5. Step 5: Solve for x
    x = 4,908,253,283.33/80,648.49
  6. Step 6: Final answer
    x = 60,859.83

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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.