Home / 126,106.39-189,215.61-66,120.49

Finding the Fourth Proportional to 126,106.39, 189,215.61 and 66,120.49

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Solution

The fourth proportional to 126,106.39, 189,215.61 and 66,120.49 is: 99,210.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,106.39 : 189,215.61 = 66,120.49 : x
  2. Step 2: Convert to fraction form
    126,106.39/189,215.61 = 66,120.49/x
  3. Step 3: Cross multiply
    126,106.39x = 189,215.61 × 66,120.49
  4. Step 4: Simplify right side
    126,106.39x = 12,511,028,848.85
  5. Step 5: Solve for x
    x = 12,511,028,848.85/126,106.39
  6. Step 6: Final answer
    x = 99,210.11

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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.