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Finding the Fourth Proportional to 115,722.40, 173,756.40 and 80,816.80

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Solution

The fourth proportional to 115,722.40, 173,756.40 and 80,816.80 is: 121,345.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,722.40 : 173,756.40 = 80,816.80 : x
  2. Step 2: Convert to fraction form
    115,722.40/173,756.40 = 80,816.80/x
  3. Step 3: Cross multiply
    115,722.40x = 173,756.40 × 80,816.80
  4. Step 4: Simplify right side
    115,722.40x = 14,042,436,227.52
  5. Step 5: Solve for x
    x = 14,042,436,227.52/115,722.40
  6. Step 6: Final answer
    x = 121,345.88

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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.