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Finding the Fourth Proportional to 85,234.56, 127,920.32 and 38,491.52

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Solution

The fourth proportional to 85,234.56, 127,920.32 and 38,491.52 is: 57,768.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,234.56 : 127,920.32 = 38,491.52 : x
  2. Step 2: Convert to fraction form
    85,234.56/127,920.32 = 38,491.52/x
  3. Step 3: Cross multiply
    85,234.56x = 127,920.32 × 38,491.52
  4. Step 4: Simplify right side
    85,234.56x = 4,923,847,555.69
  5. Step 5: Solve for x
    x = 4,923,847,555.69/85,234.56
  6. Step 6: Final answer
    x = 57,768.21

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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.