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Finding the Fourth Proportional to 72,896.76, 109,155.51 and 68,463.90

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Solution

The fourth proportional to 72,896.76, 109,155.51 and 68,463.90 is: 102,517.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,896.76 : 109,155.51 = 68,463.90 : x
  2. Step 2: Convert to fraction form
    72,896.76/109,155.51 = 68,463.90/x
  3. Step 3: Cross multiply
    72,896.76x = 109,155.51 × 68,463.90
  4. Step 4: Simplify right side
    72,896.76x = 7,473,211,921.09
  5. Step 5: Solve for x
    x = 7,473,211,921.09/72,896.76
  6. Step 6: Final answer
    x = 102,517.75

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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.