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Finding the Fourth Proportional to 115,912.90, 173,894.55 and 66,016.90

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Solution

The fourth proportional to 115,912.90, 173,894.55 and 66,016.90 is: 99,039.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,912.90 : 173,894.55 = 66,016.90 : x
  2. Step 2: Convert to fraction form
    115,912.90/173,894.55 = 66,016.90/x
  3. Step 3: Cross multiply
    115,912.90x = 173,894.55 × 66,016.90
  4. Step 4: Simplify right side
    115,912.90x = 11,479,979,117.90
  5. Step 5: Solve for x
    x = 11,479,979,117.90/115,912.90
  6. Step 6: Final answer
    x = 99,039.70

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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.