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Finding the Fourth Proportional to 80,088.65, 120,124.76 and 20,916.62

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Solution

The fourth proportional to 80,088.65, 120,124.76 and 20,916.62 is: 31,372.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,088.65 : 120,124.76 = 20,916.62 : x
  2. Step 2: Convert to fraction form
    80,088.65/120,124.76 = 20,916.62/x
  3. Step 3: Cross multiply
    80,088.65x = 120,124.76 × 20,916.62
  4. Step 4: Simplify right side
    80,088.65x = 2,512,603,252.30
  5. Step 5: Solve for x
    x = 2,512,603,252.30/80,088.65
  6. Step 6: Final answer
    x = 31,372.78

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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.