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Finding the Fourth Proportional to 220,135.40, 330,548.70 and 126,823.40

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Solution

The fourth proportional to 220,135.40, 330,548.70 and 126,823.40 is: 190,434.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,135.40 : 330,548.70 = 126,823.40 : x
  2. Step 2: Convert to fraction form
    220,135.40/330,548.70 = 126,823.40/x
  3. Step 3: Cross multiply
    220,135.40x = 330,548.70 × 126,823.40
  4. Step 4: Simplify right side
    220,135.40x = 41,921,309,999.58
  5. Step 5: Solve for x
    x = 41,921,309,999.58/220,135.40
  6. Step 6: Final answer
    x = 190,434.21

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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.