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Finding the Fourth Proportional to 112,668.84, 155,472.20 and 67,337.80

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Solution

The fourth proportional to 112,668.84, 155,472.20 and 67,337.80 is: 92,919.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,668.84 : 155,472.20 = 67,337.80 : x
  2. Step 2: Convert to fraction form
    112,668.84/155,472.20 = 67,337.80/x
  3. Step 3: Cross multiply
    112,668.84x = 155,472.20 × 67,337.80
  4. Step 4: Simplify right side
    112,668.84x = 10,469,155,131.80
  5. Step 5: Solve for x
    x = 10,469,155,131.80/112,668.84
  6. Step 6: Final answer
    x = 92,919.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.