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Finding the Fourth Proportional to 115,611.60, 173,287.80 and 65,715.60

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Solution

The fourth proportional to 115,611.60, 173,287.80 and 65,715.60 is: 98,499.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,611.60 : 173,287.80 = 65,715.60 : x
  2. Step 2: Convert to fraction form
    115,611.60/173,287.80 = 65,715.60/x
  3. Step 3: Cross multiply
    115,611.60x = 173,287.80 × 65,715.60
  4. Step 4: Simplify right side
    115,611.60x = 11,387,711,749.68
  5. Step 5: Solve for x
    x = 11,387,711,749.68/115,611.60
  6. Step 6: Final answer
    x = 98,499.73

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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.