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Finding the Fourth Proportional to 132,940.20, 199,118.70 and 115,444.20

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Solution

The fourth proportional to 132,940.20, 199,118.70 and 115,444.20 is: 172,913.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,940.20 : 199,118.70 = 115,444.20 : x
  2. Step 2: Convert to fraction form
    132,940.20/199,118.70 = 115,444.20/x
  3. Step 3: Cross multiply
    132,940.20x = 199,118.70 × 115,444.20
  4. Step 4: Simplify right side
    132,940.20x = 22,987,099,026.54
  5. Step 5: Solve for x
    x = 22,987,099,026.54/132,940.20
  6. Step 6: Final answer
    x = 172,913.08

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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.