Home / 71,811.92-99,103.72-39,982.84

Finding the Fourth Proportional to 71,811.92, 99,103.72 and 39,982.84

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Solution

The fourth proportional to 71,811.92, 99,103.72 and 39,982.84 is: 55,178.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,811.92 : 99,103.72 = 39,982.84 : x
  2. Step 2: Convert to fraction form
    71,811.92/99,103.72 = 39,982.84/x
  3. Step 3: Cross multiply
    71,811.92x = 99,103.72 × 39,982.84
  4. Step 4: Simplify right side
    71,811.92x = 3,962,448,180.16
  5. Step 5: Solve for x
    x = 3,962,448,180.16/71,811.92
  6. Step 6: Final answer
    x = 55,178.14

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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.