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Finding the Fourth Proportional to 136,659.56, 188,590.50 and 76,228.70

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Solution

The fourth proportional to 136,659.56, 188,590.50 and 76,228.70 is: 105,195.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,659.56 : 188,590.50 = 76,228.70 : x
  2. Step 2: Convert to fraction form
    136,659.56/188,590.50 = 76,228.70/x
  3. Step 3: Cross multiply
    136,659.56x = 188,590.50 × 76,228.70
  4. Step 4: Simplify right side
    136,659.56x = 14,376,008,647.35
  5. Step 5: Solve for x
    x = 14,376,008,647.35/136,659.56
  6. Step 6: Final answer
    x = 105,195.78

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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.