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Finding the Fourth Proportional to 191,883.20, 287,565.60 and 128,523.20

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Solution

The fourth proportional to 191,883.20, 287,565.60 and 128,523.20 is: 192,611.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,883.20 : 287,565.60 = 128,523.20 : x
  2. Step 2: Convert to fraction form
    191,883.20/287,565.60 = 128,523.20/x
  3. Step 3: Cross multiply
    191,883.20x = 287,565.60 × 128,523.20
  4. Step 4: Simplify right side
    191,883.20x = 36,958,851,121.92
  5. Step 5: Solve for x
    x = 36,958,851,121.92/191,883.20
  6. Step 6: Final answer
    x = 192,611.19

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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.