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Finding the Fourth Proportional to 71,772.77, 107,586.78 and 45,137.78

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Solution

The fourth proportional to 71,772.77, 107,586.78 and 45,137.78 is: 67,661.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,772.77 : 107,586.78 = 45,137.78 : x
  2. Step 2: Convert to fraction form
    71,772.77/107,586.78 = 45,137.78/x
  3. Step 3: Cross multiply
    71,772.77x = 107,586.78 × 45,137.78
  4. Step 4: Simplify right side
    71,772.77x = 4,856,228,707.97
  5. Step 5: Solve for x
    x = 4,856,228,707.97/71,772.77
  6. Step 6: Final answer
    x = 67,661.16

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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.