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Finding the Fourth Proportional to 115,904.80, 173,857.20 and 68,471.20

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Solution

The fourth proportional to 115,904.80, 173,857.20 and 68,471.20 is: 102,706.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,904.80 : 173,857.20 = 68,471.20 : x
  2. Step 2: Convert to fraction form
    115,904.80/173,857.20 = 68,471.20/x
  3. Step 3: Cross multiply
    115,904.80x = 173,857.20 × 68,471.20
  4. Step 4: Simplify right side
    115,904.80x = 11,904,211,112.64
  5. Step 5: Solve for x
    x = 11,904,211,112.64/115,904.80
  6. Step 6: Final answer
    x = 102,706.80

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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.