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Finding the Fourth Proportional to 191,987.80, 287,592.90 and 132,890.20

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Solution

The fourth proportional to 191,987.80, 287,592.90 and 132,890.20 is: 199,066.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,987.80 : 287,592.90 = 132,890.20 : x
  2. Step 2: Convert to fraction form
    191,987.80/287,592.90 = 132,890.20/x
  3. Step 3: Cross multiply
    191,987.80x = 287,592.90 × 132,890.20
  4. Step 4: Simplify right side
    191,987.80x = 38,218,277,999.58
  5. Step 5: Solve for x
    x = 38,218,277,999.58/191,987.80
  6. Step 6: Final answer
    x = 199,066.18

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1.5x scale

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.