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Finding the Fourth Proportional to 188,713.16, 260,540.52 and 129,878

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Solution

The fourth proportional to 188,713.16, 260,540.52 and 129,878 is: 179,311.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,713.16 : 260,540.52 = 129,878 : x
  2. Step 2: Convert to fraction form
    188,713.16/260,540.52 = 129,878/x
  3. Step 3: Cross multiply
    188,713.16x = 260,540.52 × 129,878
  4. Step 4: Simplify right side
    188,713.16x = 33,838,481,656.56
  5. Step 5: Solve for x
    x = 33,838,481,656.56/188,713.16
  6. Step 6: Final answer
    x = 179,311.72

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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.