Home / 85,021.85-127,532.78-71,899.85

Finding the Fourth Proportional to 85,021.85, 127,532.78 and 71,899.85

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Solution

The fourth proportional to 85,021.85, 127,532.78 and 71,899.85 is: 107,849.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,021.85 : 127,532.78 = 71,899.85 : x
  2. Step 2: Convert to fraction form
    85,021.85/127,532.78 = 71,899.85/x
  3. Step 3: Cross multiply
    85,021.85x = 127,532.78 × 71,899.85
  4. Step 4: Simplify right side
    85,021.85x = 9,169,587,392.58
  5. Step 5: Solve for x
    x = 9,169,587,392.58/85,021.85
  6. Step 6: Final answer
    x = 107,849.78

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Similar ratio
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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.