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Finding the Fourth Proportional to 72,616.10, 108,924.15 and 45,983.30

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Solution

The fourth proportional to 72,616.10, 108,924.15 and 45,983.30 is: 68,974.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,616.10 : 108,924.15 = 45,983.30 : x
  2. Step 2: Convert to fraction form
    72,616.10/108,924.15 = 45,983.30/x
  3. Step 3: Cross multiply
    72,616.10x = 108,924.15 × 45,983.30
  4. Step 4: Simplify right side
    72,616.10x = 5,008,691,866.70
  5. Step 5: Solve for x
    x = 5,008,691,866.70/72,616.10
  6. Step 6: Final answer
    x = 68,974.95

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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.