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Finding the Fourth Proportional to 80,603.40, 120,876.30 and 36,251.40

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Solution

The fourth proportional to 80,603.40, 120,876.30 and 36,251.40 is: 54,364.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,603.40 : 120,876.30 = 36,251.40 : x
  2. Step 2: Convert to fraction form
    80,603.40/120,876.30 = 36,251.40/x
  3. Step 3: Cross multiply
    80,603.40x = 120,876.30 × 36,251.40
  4. Step 4: Simplify right side
    80,603.40x = 4,381,935,101.82
  5. Step 5: Solve for x
    x = 4,381,935,101.82/80,603.40
  6. Step 6: Final answer
    x = 54,364.15

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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.