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Finding the Fourth Proportional to 81,203.49, 121,815.14 and 34,440.57

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Solution

The fourth proportional to 81,203.49, 121,815.14 and 34,440.57 is: 51,665.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,203.49 : 121,815.14 = 34,440.57 : x
  2. Step 2: Convert to fraction form
    81,203.49/121,815.14 = 34,440.57/x
  3. Step 3: Cross multiply
    81,203.49x = 121,815.14 × 34,440.57
  4. Step 4: Simplify right side
    81,203.49x = 4,195,382,684.03
  5. Step 5: Solve for x
    x = 4,195,382,684.03/81,203.49
  6. Step 6: Final answer
    x = 51,665.05

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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.