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Finding the Fourth Proportional to 99,748.80, 137,491.84 and 86,794.88

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Solution

The fourth proportional to 99,748.80, 137,491.84 and 86,794.88 is: 119,636.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,748.80 : 137,491.84 = 86,794.88 : x
  2. Step 2: Convert to fraction form
    99,748.80/137,491.84 = 86,794.88/x
  3. Step 3: Cross multiply
    99,748.80x = 137,491.84 × 86,794.88
  4. Step 4: Simplify right side
    99,748.80x = 11,933,587,753.78
  5. Step 5: Solve for x
    x = 11,933,587,753.78/99,748.80
  6. Step 6: Final answer
    x = 119,636.40

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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.