Home / 136,780.12-188,741.10-79,401.88

Finding the Fourth Proportional to 136,780.12, 188,741.10 and 79,401.88

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Solution

The fourth proportional to 136,780.12, 188,741.10 and 79,401.88 is: 109,565.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,780.12 : 188,741.10 = 79,401.88 : x
  2. Step 2: Convert to fraction form
    136,780.12/188,741.10 = 79,401.88/x
  3. Step 3: Cross multiply
    136,780.12x = 188,741.10 × 79,401.88
  4. Step 4: Simplify right side
    136,780.12x = 14,986,398,173.27
  5. Step 5: Solve for x
    x = 14,986,398,173.27/136,780.12
  6. Step 6: Final answer
    x = 109,565.62

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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.