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Finding the Fourth Proportional to 79,613.93, 119,420.90 and 20,449.66

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Solution

The fourth proportional to 79,613.93, 119,420.90 and 20,449.66 is: 30,674.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,613.93 : 119,420.90 = 20,449.66 : x
  2. Step 2: Convert to fraction form
    79,613.93/119,420.90 = 20,449.66/x
  3. Step 3: Cross multiply
    79,613.93x = 119,420.90 × 20,449.66
  4. Step 4: Simplify right side
    79,613.93x = 2,442,116,401.09
  5. Step 5: Solve for x
    x = 2,442,116,401.09/79,613.93
  6. Step 6: Final answer
    x = 30,674.49

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Similar ratio
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1.5x scale

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.