Home / 85,255.20-127,921.20-40,864.80

Finding the Fourth Proportional to 85,255.20, 127,921.20 and 40,864.80

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Solution

The fourth proportional to 85,255.20, 127,921.20 and 40,864.80 is: 61,315.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,255.20 : 127,921.20 = 40,864.80 : x
  2. Step 2: Convert to fraction form
    85,255.20/127,921.20 = 40,864.80/x
  3. Step 3: Cross multiply
    85,255.20x = 127,921.20 × 40,864.80
  4. Step 4: Simplify right side
    85,255.20x = 5,227,474,253.76
  5. Step 5: Solve for x
    x = 5,227,474,253.76/85,255.20
  6. Step 6: Final answer
    x = 61,315.61

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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.