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Finding the Fourth Proportional to 73,915.92, 110,861.73 and 21,311.28

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Solution

The fourth proportional to 73,915.92, 110,861.73 and 21,311.28 is: 31,963.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,915.92 : 110,861.73 = 21,311.28 : x
  2. Step 2: Convert to fraction form
    73,915.92/110,861.73 = 21,311.28/x
  3. Step 3: Cross multiply
    73,915.92x = 110,861.73 × 21,311.28
  4. Step 4: Simplify right side
    73,915.92x = 2,362,605,369.31
  5. Step 5: Solve for x
    x = 2,362,605,369.31/73,915.92
  6. Step 6: Final answer
    x = 31,963.42

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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.