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Finding the Fourth Proportional to 136,616.64, 188,531.79 and 76,191.12

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Solution

The fourth proportional to 136,616.64, 188,531.79 and 76,191.12 is: 105,144.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,616.64 : 188,531.79 = 76,191.12 : x
  2. Step 2: Convert to fraction form
    136,616.64/188,531.79 = 76,191.12/x
  3. Step 3: Cross multiply
    136,616.64x = 188,531.79 × 76,191.12
  4. Step 4: Simplify right side
    136,616.64x = 14,364,448,235.70
  5. Step 5: Solve for x
    x = 14,364,448,235.70/136,616.64
  6. Step 6: Final answer
    x = 105,144.21

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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.