Home / 135,067.14-186,387.21-78,474.06

Finding the Fourth Proportional to 135,067.14, 186,387.21 and 78,474.06

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Solution

The fourth proportional to 135,067.14, 186,387.21 and 78,474.06 is: 108,291.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,067.14 : 186,387.21 = 78,474.06 : x
  2. Step 2: Convert to fraction form
    135,067.14/186,387.21 = 78,474.06/x
  3. Step 3: Cross multiply
    135,067.14x = 186,387.21 × 78,474.06
  4. Step 4: Simplify right side
    135,067.14x = 14,626,561,100.77
  5. Step 5: Solve for x
    x = 14,626,561,100.77/135,067.14
  6. Step 6: Final answer
    x = 108,291.04

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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.