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Finding the Fourth Proportional to 191,988.80, 287,594.40 and 132,891.20

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Solution

The fourth proportional to 191,988.80, 287,594.40 and 132,891.20 is: 199,067.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,988.80 : 287,594.40 = 132,891.20 : x
  2. Step 2: Convert to fraction form
    191,988.80/287,594.40 = 132,891.20/x
  3. Step 3: Cross multiply
    191,988.80x = 287,594.40 × 132,891.20
  4. Step 4: Simplify right side
    191,988.80x = 38,218,764,929.28
  5. Step 5: Solve for x
    x = 38,218,764,929.28/191,988.80
  6. Step 6: Final answer
    x = 199,067.68

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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.