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Finding the Fourth Proportional to 168,659.80, 252,698.10 and 79,721.80

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Solution

The fourth proportional to 168,659.80, 252,698.10 and 79,721.80 is: 119,444.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,659.80 : 252,698.10 = 79,721.80 : x
  2. Step 2: Convert to fraction form
    168,659.80/252,698.10 = 79,721.80/x
  3. Step 3: Cross multiply
    168,659.80x = 252,698.10 × 79,721.80
  4. Step 4: Simplify right side
    168,659.80x = 20,145,547,388.58
  5. Step 5: Solve for x
    x = 20,145,547,388.58/168,659.80
  6. Step 6: Final answer
    x = 119,444.87

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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.