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Finding the Fourth Proportional to 117,189.72, 161,677.20 and 86,636.20

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Solution

The fourth proportional to 117,189.72, 161,677.20 and 86,636.20 is: 119,524.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,189.72 : 161,677.20 = 86,636.20 : x
  2. Step 2: Convert to fraction form
    117,189.72/161,677.20 = 86,636.20/x
  3. Step 3: Cross multiply
    117,189.72x = 161,677.20 × 86,636.20
  4. Step 4: Simplify right side
    117,189.72x = 14,007,098,234.64
  5. Step 5: Solve for x
    x = 14,007,098,234.64/117,189.72
  6. Step 6: Final answer
    x = 119,524.97

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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.