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Finding the Fourth Proportional to 165,220.80, 247,657.92 and 80,864.64

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Solution

The fourth proportional to 165,220.80, 247,657.92 and 80,864.64 is: 121,212.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,220.80 : 247,657.92 = 80,864.64 : x
  2. Step 2: Convert to fraction form
    165,220.80/247,657.92 = 80,864.64/x
  3. Step 3: Cross multiply
    165,220.80x = 247,657.92 × 80,864.64
  4. Step 4: Simplify right side
    165,220.80x = 20,026,768,543.95
  5. Step 5: Solve for x
    x = 20,026,768,543.95/165,220.80
  6. Step 6: Final answer
    x = 121,212.15

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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.