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Finding the Fourth Proportional to 121,686.20, 182,169.89 and 89,885.09

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Solution

The fourth proportional to 121,686.20, 182,169.89 and 89,885.09 is: 134,562.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,686.20 : 182,169.89 = 89,885.09 : x
  2. Step 2: Convert to fraction form
    121,686.20/182,169.89 = 89,885.09/x
  3. Step 3: Cross multiply
    121,686.20x = 182,169.89 × 89,885.09
  4. Step 4: Simplify right side
    121,686.20x = 16,374,357,048.21
  5. Step 5: Solve for x
    x = 16,374,357,048.21/121,686.20
  6. Step 6: Final answer
    x = 134,562.15

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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.