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Finding the Fourth Proportional to 80,697.15, 121,031.10 and 27,381.78

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Solution

The fourth proportional to 80,697.15, 121,031.10 and 27,381.78 is: 41,067.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,697.15 : 121,031.10 = 27,381.78 : x
  2. Step 2: Convert to fraction form
    80,697.15/121,031.10 = 27,381.78/x
  3. Step 3: Cross multiply
    80,697.15x = 121,031.10 × 27,381.78
  4. Step 4: Simplify right side
    80,697.15x = 3,314,046,953.36
  5. Step 5: Solve for x
    x = 3,314,046,953.36/80,697.15
  6. Step 6: Final answer
    x = 41,067.71

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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.