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Finding the Fourth Proportional to 135,388.63, 186,828.87 and 80,941.87

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Solution

The fourth proportional to 135,388.63, 186,828.87 and 80,941.87 is: 111,695.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,388.63 : 186,828.87 = 80,941.87 : x
  2. Step 2: Convert to fraction form
    135,388.63/186,828.87 = 80,941.87/x
  3. Step 3: Cross multiply
    135,388.63x = 186,828.87 × 80,941.87
  4. Step 4: Simplify right side
    135,388.63x = 15,122,278,107.79
  5. Step 5: Solve for x
    x = 15,122,278,107.79/135,388.63
  6. Step 6: Final answer
    x = 111,695.33

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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.