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Finding the Fourth Proportional to 80,777.67, 121,168.13 and 21,613.25

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Solution

The fourth proportional to 80,777.67, 121,168.13 and 21,613.25 is: 32,420.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,777.67 : 121,168.13 = 21,613.25 : x
  2. Step 2: Convert to fraction form
    80,777.67/121,168.13 = 21,613.25/x
  3. Step 3: Cross multiply
    80,777.67x = 121,168.13 × 21,613.25
  4. Step 4: Simplify right side
    80,777.67x = 2,618,836,371.82
  5. Step 5: Solve for x
    x = 2,618,836,371.82/80,777.67
  6. Step 6: Final answer
    x = 32,420.30

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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.