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Finding the Fourth Proportional to 191,786.80, 287,680.20 and 156,794.80

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Solution

The fourth proportional to 191,786.80, 287,680.20 and 156,794.80 is: 235,192.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,786.80 : 287,680.20 = 156,794.80 : x
  2. Step 2: Convert to fraction form
    191,786.80/287,680.20 = 156,794.80/x
  3. Step 3: Cross multiply
    191,786.80x = 287,680.20 × 156,794.80
  4. Step 4: Simplify right side
    191,786.80x = 45,106,759,422.96
  5. Step 5: Solve for x
    x = 45,106,759,422.96/191,786.80
  6. Step 6: Final answer
    x = 235,192.20

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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.