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Finding the Fourth Proportional to 191,785.80, 287,678.70 and 156,793.80

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Solution

The fourth proportional to 191,785.80, 287,678.70 and 156,793.80 is: 235,190.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,785.80 : 287,678.70 = 156,793.80 : x
  2. Step 2: Convert to fraction form
    191,785.80/287,678.70 = 156,793.80/x
  3. Step 3: Cross multiply
    191,785.80x = 287,678.70 × 156,793.80
  4. Step 4: Simplify right side
    191,785.80x = 45,106,236,552.06
  5. Step 5: Solve for x
    x = 45,106,236,552.06/191,785.80
  6. Step 6: Final answer
    x = 235,190.70

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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.