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Finding the Fourth Proportional to 71,729.35, 98,986.46 and 39,897.56

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Solution

The fourth proportional to 71,729.35, 98,986.46 and 39,897.56 is: 55,058.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,729.35 : 98,986.46 = 39,897.56 : x
  2. Step 2: Convert to fraction form
    71,729.35/98,986.46 = 39,897.56/x
  3. Step 3: Cross multiply
    71,729.35x = 98,986.46 × 39,897.56
  4. Step 4: Simplify right side
    71,729.35x = 3,949,318,275.02
  5. Step 5: Solve for x
    x = 3,949,318,275.02/71,729.35
  6. Step 6: Final answer
    x = 55,058.61

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1.5x scale

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.