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Finding the Fourth Proportional to 191,900.87, 287,728.12 and 79,658.56

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Solution

The fourth proportional to 191,900.87, 287,728.12 and 79,658.56 is: 119,436.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,900.87 : 287,728.12 = 79,658.56 : x
  2. Step 2: Convert to fraction form
    191,900.87/287,728.12 = 79,658.56/x
  3. Step 3: Cross multiply
    191,900.87x = 287,728.12 × 79,658.56
  4. Step 4: Simplify right side
    191,900.87x = 22,920,007,710.71
  5. Step 5: Solve for x
    x = 22,920,007,710.71/191,900.87
  6. Step 6: Final answer
    x = 119,436.71

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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.