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Finding the Fourth Proportional to 71,322.60, 107,060.70 and 40,218.60

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Solution

The fourth proportional to 71,322.60, 107,060.70 and 40,218.60 is: 60,371.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,322.60 : 107,060.70 = 40,218.60 : x
  2. Step 2: Convert to fraction form
    71,322.60/107,060.70 = 40,218.60/x
  3. Step 3: Cross multiply
    71,322.60x = 107,060.70 × 40,218.60
  4. Step 4: Simplify right side
    71,322.60x = 4,305,831,469.02
  5. Step 5: Solve for x
    x = 4,305,831,469.02/71,322.60
  6. Step 6: Final answer
    x = 60,371.21

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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.