Home / 85,221.28-127,735.92-40,786.72

Finding the Fourth Proportional to 85,221.28, 127,735.92 and 40,786.72

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Solution

The fourth proportional to 85,221.28, 127,735.92 and 40,786.72 is: 61,134.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,221.28 : 127,735.92 = 40,786.72 : x
  2. Step 2: Convert to fraction form
    85,221.28/127,735.92 = 40,786.72/x
  3. Step 3: Cross multiply
    85,221.28x = 127,735.92 × 40,786.72
  4. Step 4: Simplify right side
    85,221.28x = 5,209,929,202.98
  5. Step 5: Solve for x
    x = 5,209,929,202.98/85,221.28
  6. Step 6: Final answer
    x = 61,134.13

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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.