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Finding the Fourth Proportional to 115,722.60, 173,195.10 and 80,730.60

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Solution

The fourth proportional to 115,722.60, 173,195.10 and 80,730.60 is: 120,824.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,722.60 : 173,195.10 = 80,730.60 : x
  2. Step 2: Convert to fraction form
    115,722.60/173,195.10 = 80,730.60/x
  3. Step 3: Cross multiply
    115,722.60x = 173,195.10 × 80,730.60
  4. Step 4: Simplify right side
    115,722.60x = 13,982,144,340.06
  5. Step 5: Solve for x
    x = 13,982,144,340.06/115,722.60
  6. Step 6: Final answer
    x = 120,824.66

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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.