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Finding the Fourth Proportional to 191,500.80, 287,251.20 and 125,145.60

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Solution

The fourth proportional to 191,500.80, 287,251.20 and 125,145.60 is: 187,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,500.80 : 287,251.20 = 125,145.60 : x
  2. Step 2: Convert to fraction form
    191,500.80/287,251.20 = 125,145.60/x
  3. Step 3: Cross multiply
    191,500.80x = 287,251.20 × 125,145.60
  4. Step 4: Simplify right side
    191,500.80x = 35,948,223,774.72
  5. Step 5: Solve for x
    x = 35,948,223,774.72/191,500.80
  6. Step 6: Final answer
    x = 187,718.40

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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.