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Finding the Fourth Proportional to 115,909.60, 173,734.80 and 66,013.60

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Solution

The fourth proportional to 115,909.60, 173,734.80 and 66,013.60 is: 98,946.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,909.60 : 173,734.80 = 66,013.60 : x
  2. Step 2: Convert to fraction form
    115,909.60/173,734.80 = 66,013.60/x
  3. Step 3: Cross multiply
    115,909.60x = 173,734.80 × 66,013.60
  4. Step 4: Simplify right side
    115,909.60x = 11,468,859,593.28
  5. Step 5: Solve for x
    x = 11,468,859,593.28/115,909.60
  6. Step 6: Final answer
    x = 98,946.59

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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.