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Finding the Fourth Proportional to 81,323.92, 121,791.16 and 51,648.88

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Solution

The fourth proportional to 81,323.92, 121,791.16 and 51,648.88 is: 77,349.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,323.92 : 121,791.16 = 51,648.88 : x
  2. Step 2: Convert to fraction form
    81,323.92/121,791.16 = 51,648.88/x
  3. Step 3: Cross multiply
    81,323.92x = 121,791.16 × 51,648.88
  4. Step 4: Simplify right side
    81,323.92x = 6,290,377,007.90
  5. Step 5: Solve for x
    x = 6,290,377,007.90/81,323.92
  6. Step 6: Final answer
    x = 77,349.65

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1.5x scale

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.