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Finding the Fourth Proportional to 80,012.86, 120,061.20 and 51,926.30

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Solution

The fourth proportional to 80,012.86, 120,061.20 and 51,926.30 is: 77,916.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,012.86 : 120,061.20 = 51,926.30 : x
  2. Step 2: Convert to fraction form
    80,012.86/120,061.20 = 51,926.30/x
  3. Step 3: Cross multiply
    80,012.86x = 120,061.20 × 51,926.30
  4. Step 4: Simplify right side
    80,012.86x = 6,234,333,889.56
  5. Step 5: Solve for x
    x = 6,234,333,889.56/80,012.86
  6. Step 6: Final answer
    x = 77,916.65

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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.