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Finding the Fourth Proportional to 90,491.72, 124,879.24 and 49,655.56

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Solution

The fourth proportional to 90,491.72, 124,879.24 and 49,655.56 is: 68,525.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,491.72 : 124,879.24 = 49,655.56 : x
  2. Step 2: Convert to fraction form
    90,491.72/124,879.24 = 49,655.56/x
  3. Step 3: Cross multiply
    90,491.72x = 124,879.24 × 49,655.56
  4. Step 4: Simplify right side
    90,491.72x = 6,200,948,594.57
  5. Step 5: Solve for x
    x = 6,200,948,594.57/90,491.72
  6. Step 6: Final answer
    x = 68,525.04

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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.