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Finding the Fourth Proportional to 71,139.60, 106,711.22 and 33,690.87

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Solution

The fourth proportional to 71,139.60, 106,711.22 and 33,690.87 is: 50,537.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,139.60 : 106,711.22 = 33,690.87 : x
  2. Step 2: Convert to fraction form
    71,139.60/106,711.22 = 33,690.87/x
  3. Step 3: Cross multiply
    71,139.60x = 106,711.22 × 33,690.87
  4. Step 4: Simplify right side
    71,139.60x = 3,595,193,924.79
  5. Step 5: Solve for x
    x = 3,595,193,924.79/71,139.60
  6. Step 6: Final answer
    x = 50,537.17

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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.