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Finding the Fourth Proportional to 220,139.40, 330,554.70 and 126,827.40

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Solution

The fourth proportional to 220,139.40, 330,554.70 and 126,827.40 is: 190,440.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,139.40 : 330,554.70 = 126,827.40 : x
  2. Step 2: Convert to fraction form
    220,139.40/330,554.70 = 126,827.40/x
  3. Step 3: Cross multiply
    220,139.40x = 330,554.70 × 126,827.40
  4. Step 4: Simplify right side
    220,139.40x = 41,923,393,158.78
  5. Step 5: Solve for x
    x = 41,923,393,158.78/220,139.40
  6. Step 6: Final answer
    x = 190,440.21

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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.