Home / 136,191.87-187,885.44-85,115.70

Finding the Fourth Proportional to 136,191.87, 187,885.44 and 85,115.70

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Solution

The fourth proportional to 136,191.87, 187,885.44 and 85,115.70 is: 117,422.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,191.87 : 187,885.44 = 85,115.70 : x
  2. Step 2: Convert to fraction form
    136,191.87/187,885.44 = 85,115.70/x
  3. Step 3: Cross multiply
    136,191.87x = 187,885.44 × 85,115.70
  4. Step 4: Simplify right side
    136,191.87x = 15,992,000,745.41
  5. Step 5: Solve for x
    x = 15,992,000,745.41/136,191.87
  6. Step 6: Final answer
    x = 117,422.58

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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.