Home / 127,982.80-191,974.20-85,992.40

Finding the Fourth Proportional to 127,982.80, 191,974.20 and 85,992.40

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Solution

The fourth proportional to 127,982.80, 191,974.20 and 85,992.40 is: 128,988.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,982.80 : 191,974.20 = 85,992.40 : x
  2. Step 2: Convert to fraction form
    127,982.80/191,974.20 = 85,992.40/x
  3. Step 3: Cross multiply
    127,982.80x = 191,974.20 × 85,992.40
  4. Step 4: Simplify right side
    127,982.80x = 16,508,322,196.08
  5. Step 5: Solve for x
    x = 16,508,322,196.08/127,982.80
  6. Step 6: Final answer
    x = 128,988.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.