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Finding the Fourth Proportional to 136,611.66, 188,524.90 and 76,186.12

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Solution

The fourth proportional to 136,611.66, 188,524.90 and 76,186.12 is: 105,137.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,611.66 : 188,524.90 = 76,186.12 : x
  2. Step 2: Convert to fraction form
    136,611.66/188,524.90 = 76,186.12/x
  3. Step 3: Cross multiply
    136,611.66x = 188,524.90 × 76,186.12
  4. Step 4: Simplify right side
    136,611.66x = 14,362,980,654.39
  5. Step 5: Solve for x
    x = 14,362,980,654.39/136,611.66
  6. Step 6: Final answer
    x = 105,137.30

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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.