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Finding the Fourth Proportional to 115,892.40, 173,619.90 and 108,019.20

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Solution

The fourth proportional to 115,892.40, 173,619.90 and 108,019.20 is: 161,824.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,892.40 : 173,619.90 = 108,019.20 : x
  2. Step 2: Convert to fraction form
    115,892.40/173,619.90 = 108,019.20/x
  3. Step 3: Cross multiply
    115,892.40x = 173,619.90 × 108,019.20
  4. Step 4: Simplify right side
    115,892.40x = 18,754,282,702.08
  5. Step 5: Solve for x
    x = 18,754,282,702.08/115,892.40
  6. Step 6: Final answer
    x = 161,824.96

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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.