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Finding the Fourth Proportional to 126,632.80, 189,949.20 and 120,800.80

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Solution

The fourth proportional to 126,632.80, 189,949.20 and 120,800.80 is: 181,201.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,632.80 : 189,949.20 = 120,800.80 : x
  2. Step 2: Convert to fraction form
    126,632.80/189,949.20 = 120,800.80/x
  3. Step 3: Cross multiply
    126,632.80x = 189,949.20 × 120,800.80
  4. Step 4: Simplify right side
    126,632.80x = 22,946,015,319.36
  5. Step 5: Solve for x
    x = 22,946,015,319.36/126,632.80
  6. Step 6: Final answer
    x = 181,201.20

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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.