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Finding the Fourth Proportional to 72,376.32, 99,872.64 and 40,546.56

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Solution

The fourth proportional to 72,376.32, 99,872.64 and 40,546.56 is: 55,950.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,376.32 : 99,872.64 = 40,546.56 : x
  2. Step 2: Convert to fraction form
    72,376.32/99,872.64 = 40,546.56/x
  3. Step 3: Cross multiply
    72,376.32x = 99,872.64 × 40,546.56
  4. Step 4: Simplify right side
    72,376.32x = 4,049,491,990.12
  5. Step 5: Solve for x
    x = 4,049,491,990.12/72,376.32
  6. Step 6: Final answer
    x = 55,950.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.