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Finding the Fourth Proportional to 126,751.80, 190,127.70 and 120,919.80

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Solution

The fourth proportional to 126,751.80, 190,127.70 and 120,919.80 is: 181,379.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,751.80 : 190,127.70 = 120,919.80 : x
  2. Step 2: Convert to fraction form
    126,751.80/190,127.70 = 120,919.80/x
  3. Step 3: Cross multiply
    126,751.80x = 190,127.70 × 120,919.80
  4. Step 4: Simplify right side
    126,751.80x = 22,990,203,458.46
  5. Step 5: Solve for x
    x = 22,990,203,458.46/126,751.80
  6. Step 6: Final answer
    x = 181,379.70

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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.