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Finding the Fourth Proportional to 136,624.88, 188,542.20 and 76,200.88

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Solution

The fourth proportional to 136,624.88, 188,542.20 and 76,200.88 is: 105,157.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,624.88 : 188,542.20 = 76,200.88 : x
  2. Step 2: Convert to fraction form
    136,624.88/188,542.20 = 76,200.88/x
  3. Step 3: Cross multiply
    136,624.88x = 188,542.20 × 76,200.88
  4. Step 4: Simplify right side
    136,624.88x = 14,367,081,557.14
  5. Step 5: Solve for x
    x = 14,367,081,557.14/136,624.88
  6. Step 6: Final answer
    x = 105,157.14

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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.