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Finding the Fourth Proportional to 125,443.64, 173,112.78 and 68,855.48

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Solution

The fourth proportional to 125,443.64, 173,112.78 and 68,855.48 is: 95,020.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,443.64 : 173,112.78 = 68,855.48 : x
  2. Step 2: Convert to fraction form
    125,443.64/173,112.78 = 68,855.48/x
  3. Step 3: Cross multiply
    125,443.64x = 173,112.78 × 68,855.48
  4. Step 4: Simplify right side
    125,443.64x = 11,919,763,561.03
  5. Step 5: Solve for x
    x = 11,919,763,561.03/125,443.64
  6. Step 6: Final answer
    x = 95,020.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.