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Finding the Fourth Proportional to 71,160.17, 106,758.72 and 21,240.27

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Solution

The fourth proportional to 71,160.17, 106,758.72 and 21,240.27 is: 31,865.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,160.17 : 106,758.72 = 21,240.27 : x
  2. Step 2: Convert to fraction form
    71,160.17/106,758.72 = 21,240.27/x
  3. Step 3: Cross multiply
    71,160.17x = 106,758.72 × 21,240.27
  4. Step 4: Simplify right side
    71,160.17x = 2,267,584,037.65
  5. Step 5: Solve for x
    x = 2,267,584,037.65/71,160.17
  6. Step 6: Final answer
    x = 31,865.92

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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.