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Finding the Fourth Proportional to 72,964.30, 109,385.70 and 30,876.70

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Solution

The fourth proportional to 72,964.30, 109,385.70 and 30,876.70 is: 46,289.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,964.30 : 109,385.70 = 30,876.70 : x
  2. Step 2: Convert to fraction form
    72,964.30/109,385.70 = 30,876.70/x
  3. Step 3: Cross multiply
    72,964.30x = 109,385.70 × 30,876.70
  4. Step 4: Simplify right side
    72,964.30x = 3,377,469,443.19
  5. Step 5: Solve for x
    x = 3,377,469,443.19/72,964.30
  6. Step 6: Final answer
    x = 46,289.34

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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.