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Finding the Fourth Proportional to 168,178.28, 252,141 and 79,381.28

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Solution

The fourth proportional to 168,178.28, 252,141 and 79,381.28 is: 119,012.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,178.28 : 252,141 = 79,381.28 : x
  2. Step 2: Convert to fraction form
    168,178.28/252,141 = 79,381.28/x
  3. Step 3: Cross multiply
    168,178.28x = 252,141 × 79,381.28
  4. Step 4: Simplify right side
    168,178.28x = 20,015,275,320.48
  5. Step 5: Solve for x
    x = 20,015,275,320.48/168,178.28
  6. Step 6: Final answer
    x = 119,012.25

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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.