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Finding the Fourth Proportional to 138,696.12, 191,400.20 and 75,033.94

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Solution

The fourth proportional to 138,696.12, 191,400.20 and 75,033.94 is: 103,546.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,696.12 : 191,400.20 = 75,033.94 : x
  2. Step 2: Convert to fraction form
    138,696.12/191,400.20 = 75,033.94/x
  3. Step 3: Cross multiply
    138,696.12x = 191,400.20 × 75,033.94
  4. Step 4: Simplify right side
    138,696.12x = 14,361,511,122.79
  5. Step 5: Solve for x
    x = 14,361,511,122.79/138,696.12
  6. Step 6: Final answer
    x = 103,546.60

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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.