Home / 71,759.12-99,031.46-39,928.70

Finding the Fourth Proportional to 71,759.12, 99,031.46 and 39,928.70

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Solution

The fourth proportional to 71,759.12, 99,031.46 and 39,928.70 is: 55,103.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,759.12 : 99,031.46 = 39,928.70 : x
  2. Step 2: Convert to fraction form
    71,759.12/99,031.46 = 39,928.70/x
  3. Step 3: Cross multiply
    71,759.12x = 99,031.46 × 39,928.70
  4. Step 4: Simplify right side
    71,759.12x = 3,954,197,172.38
  5. Step 5: Solve for x
    x = 3,954,197,172.38/71,759.12
  6. Step 6: Final answer
    x = 55,103.76

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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.