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Finding the Fourth Proportional to 80,436.63, 120,639.11 and 27,123.42

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Solution

The fourth proportional to 80,436.63, 120,639.11 and 27,123.42 is: 40,679.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,436.63 : 120,639.11 = 27,123.42 : x
  2. Step 2: Convert to fraction form
    80,436.63/120,639.11 = 27,123.42/x
  3. Step 3: Cross multiply
    80,436.63x = 120,639.11 × 27,123.42
  4. Step 4: Simplify right side
    80,436.63x = 3,272,145,113.34
  5. Step 5: Solve for x
    x = 3,272,145,113.34/80,436.63
  6. Step 6: Final answer
    x = 40,679.79

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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.