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Finding the Fourth Proportional to 191,998.65, 288,126.44 and 79,678.88

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Solution

The fourth proportional to 191,998.65, 288,126.44 and 79,678.88 is: 119,571.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,998.65 : 288,126.44 = 79,678.88 : x
  2. Step 2: Convert to fraction form
    191,998.65/288,126.44 = 79,678.88/x
  3. Step 3: Cross multiply
    191,998.65x = 288,126.44 × 79,678.88
  4. Step 4: Simplify right side
    191,998.65x = 22,957,592,037.59
  5. Step 5: Solve for x
    x = 22,957,592,037.59/191,998.65
  6. Step 6: Final answer
    x = 119,571.63

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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.