Home / 135,819.20-187,442.35-79,248.80

Finding the Fourth Proportional to 135,819.20, 187,442.35 and 79,248.80

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Solution

The fourth proportional to 135,819.20, 187,442.35 and 79,248.80 is: 109,370.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,819.20 : 187,442.35 = 79,248.80 : x
  2. Step 2: Convert to fraction form
    135,819.20/187,442.35 = 79,248.80/x
  3. Step 3: Cross multiply
    135,819.20x = 187,442.35 × 79,248.80
  4. Step 4: Simplify right side
    135,819.20x = 14,854,580,171.35
  5. Step 5: Solve for x
    x = 14,854,580,171.35/135,819.20
  6. Step 6: Final answer
    x = 109,370.26

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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.