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Finding the Fourth Proportional to 80,679.80, 121,019.70 and 41,223.80

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Solution

The fourth proportional to 80,679.80, 121,019.70 and 41,223.80 is: 61,835.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,679.80 : 121,019.70 = 41,223.80 : x
  2. Step 2: Convert to fraction form
    80,679.80/121,019.70 = 41,223.80/x
  3. Step 3: Cross multiply
    80,679.80x = 121,019.70 × 41,223.80
  4. Step 4: Simplify right side
    80,679.80x = 4,988,891,908.86
  5. Step 5: Solve for x
    x = 4,988,891,908.86/80,679.80
  6. Step 6: Final answer
    x = 61,835.70

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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.