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Finding the Fourth Proportional to 78,794.80, 108,608.16 and 54,879.92

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Solution

The fourth proportional to 78,794.80, 108,608.16 and 54,879.92 is: 75,644.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,794.80 : 108,608.16 = 54,879.92 : x
  2. Step 2: Convert to fraction form
    78,794.80/108,608.16 = 54,879.92/x
  3. Step 3: Cross multiply
    78,794.80x = 108,608.16 × 54,879.92
  4. Step 4: Simplify right side
    78,794.80x = 5,960,407,132.15
  5. Step 5: Solve for x
    x = 5,960,407,132.15/78,794.80
  6. Step 6: Final answer
    x = 75,644.68

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1.5x scale

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.