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Finding the Fourth Proportional to 169,780.80, 254,379.60 and 80,842.80

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Solution

The fourth proportional to 169,780.80, 254,379.60 and 80,842.80 is: 121,125.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,780.80 : 254,379.60 = 80,842.80 : x
  2. Step 2: Convert to fraction form
    169,780.80/254,379.60 = 80,842.80/x
  3. Step 3: Cross multiply
    169,780.80x = 254,379.60 × 80,842.80
  4. Step 4: Simplify right side
    169,780.80x = 20,564,759,126.88
  5. Step 5: Solve for x
    x = 20,564,759,126.88/169,780.80
  6. Step 6: Final answer
    x = 121,125.35

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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.