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Finding the Fourth Proportional to 72,951.30, 109,366.20 and 30,863.70

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Solution

The fourth proportional to 72,951.30, 109,366.20 and 30,863.70 is: 46,269.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,951.30 : 109,366.20 = 30,863.70 : x
  2. Step 2: Convert to fraction form
    72,951.30/109,366.20 = 30,863.70/x
  3. Step 3: Cross multiply
    72,951.30x = 109,366.20 × 30,863.70
  4. Step 4: Simplify right side
    72,951.30x = 3,375,445,586.94
  5. Step 5: Solve for x
    x = 3,375,445,586.94/72,951.30
  6. Step 6: Final answer
    x = 46,269.85

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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.