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Finding the Fourth Proportional to 220,502.58, 330,491.40 and 126,811.50

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Solution

The fourth proportional to 220,502.58, 330,491.40 and 126,811.50 is: 190,066.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,502.58 : 330,491.40 = 126,811.50 : x
  2. Step 2: Convert to fraction form
    220,502.58/330,491.40 = 126,811.50/x
  3. Step 3: Cross multiply
    220,502.58x = 330,491.40 × 126,811.50
  4. Step 4: Simplify right side
    220,502.58x = 41,910,110,171.10
  5. Step 5: Solve for x
    x = 41,910,110,171.10/220,502.58
  6. Step 6: Final answer
    x = 190,066.30

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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.