Home / 127,982.20-191,973.30-85,991.80

Finding the Fourth Proportional to 127,982.20, 191,973.30 and 85,991.80

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Solution

The fourth proportional to 127,982.20, 191,973.30 and 85,991.80 is: 128,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,982.20 : 191,973.30 = 85,991.80 : x
  2. Step 2: Convert to fraction form
    127,982.20/191,973.30 = 85,991.80/x
  3. Step 3: Cross multiply
    127,982.20x = 191,973.30 × 85,991.80
  4. Step 4: Simplify right side
    127,982.20x = 16,508,129,618.94
  5. Step 5: Solve for x
    x = 16,508,129,618.94/127,982.20
  6. Step 6: Final answer
    x = 128,987.70

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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.