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Finding the Fourth Proportional to 80,118.56, 120,168.66 and 20,959.94

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Solution

The fourth proportional to 80,118.56, 120,168.66 and 20,959.94 is: 31,437.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,118.56 : 120,168.66 = 20,959.94 : x
  2. Step 2: Convert to fraction form
    80,118.56/120,168.66 = 20,959.94/x
  3. Step 3: Cross multiply
    80,118.56x = 120,168.66 × 20,959.94
  4. Step 4: Simplify right side
    80,118.56x = 2,518,727,903.48
  5. Step 5: Solve for x
    x = 2,518,727,903.48/80,118.56
  6. Step 6: Final answer
    x = 31,437.51

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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.