Home / 127,976.20-191,964.30-77,237.80

Finding the Fourth Proportional to 127,976.20, 191,964.30 and 77,237.80

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Solution

The fourth proportional to 127,976.20, 191,964.30 and 77,237.80 is: 115,856.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,976.20 : 191,964.30 = 77,237.80 : x
  2. Step 2: Convert to fraction form
    127,976.20/191,964.30 = 77,237.80/x
  3. Step 3: Cross multiply
    127,976.20x = 191,964.30 × 77,237.80
  4. Step 4: Simplify right side
    127,976.20x = 14,826,900,210.54
  5. Step 5: Solve for x
    x = 14,826,900,210.54/127,976.20
  6. Step 6: Final answer
    x = 115,856.70

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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.