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Finding the Fourth Proportional to 80,668, 111,321.92 and 45,340

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Solution

The fourth proportional to 80,668, 111,321.92 and 45,340 is: 62,569.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,668 : 111,321.92 = 45,340 : x
  2. Step 2: Convert to fraction form
    80,668/111,321.92 = 45,340/x
  3. Step 3: Cross multiply
    80,668x = 111,321.92 × 45,340
  4. Step 4: Simplify right side
    80,668x = 5,047,335,852.80
  5. Step 5: Solve for x
    x = 5,047,335,852.80/80,668
  6. Step 6: Final answer
    x = 62,569.24

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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.