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Finding the Fourth Proportional to 71,610.92, 98,823.02 and 39,782.78

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Solution

The fourth proportional to 71,610.92, 98,823.02 and 39,782.78 is: 54,900.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,610.92 : 98,823.02 = 39,782.78 : x
  2. Step 2: Convert to fraction form
    71,610.92/98,823.02 = 39,782.78/x
  3. Step 3: Cross multiply
    71,610.92x = 98,823.02 × 39,782.78
  4. Step 4: Simplify right side
    71,610.92x = 3,931,454,463.60
  5. Step 5: Solve for x
    x = 3,931,454,463.60/71,610.92
  6. Step 6: Final answer
    x = 54,900.21

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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.