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Finding the Fourth Proportional to 71,760.24, 107,631.90 and 19,173.78

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Solution

The fourth proportional to 71,760.24, 107,631.90 and 19,173.78 is: 28,758.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,760.24 : 107,631.90 = 19,173.78 : x
  2. Step 2: Convert to fraction form
    71,760.24/107,631.90 = 19,173.78/x
  3. Step 3: Cross multiply
    71,760.24x = 107,631.90 × 19,173.78
  4. Step 4: Simplify right side
    71,760.24x = 2,063,710,371.58
  5. Step 5: Solve for x
    x = 2,063,710,371.58/71,760.24
  6. Step 6: Final answer
    x = 28,758.41

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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.