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Finding the Fourth Proportional to 71,154.80, 106,716.48 and 20,542.83

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Solution

The fourth proportional to 71,154.80, 106,716.48 and 20,542.83 is: 30,809.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,154.80 : 106,716.48 = 20,542.83 : x
  2. Step 2: Convert to fraction form
    71,154.80/106,716.48 = 20,542.83/x
  3. Step 3: Cross multiply
    71,154.80x = 106,716.48 × 20,542.83
  4. Step 4: Simplify right side
    71,154.80x = 2,192,258,479.83
  5. Step 5: Solve for x
    x = 2,192,258,479.83/71,154.80
  6. Step 6: Final answer
    x = 30,809.71

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1.5x scale

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.