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Finding the Fourth Proportional to 80,639.81, 120,884.12 and 27,294.46

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Solution

The fourth proportional to 80,639.81, 120,884.12 and 27,294.46 is: 40,916.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,639.81 : 120,884.12 = 27,294.46 : x
  2. Step 2: Convert to fraction form
    80,639.81/120,884.12 = 27,294.46/x
  3. Step 3: Cross multiply
    80,639.81x = 120,884.12 × 27,294.46
  4. Step 4: Simplify right side
    80,639.81x = 3,299,466,441.65
  5. Step 5: Solve for x
    x = 3,299,466,441.65/80,639.81
  6. Step 6: Final answer
    x = 40,916.10

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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.