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Finding the Fourth Proportional to 220,491.20, 330,736.80 and 141,759.20

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Solution

The fourth proportional to 220,491.20, 330,736.80 and 141,759.20 is: 212,638.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,491.20 : 330,736.80 = 141,759.20 : x
  2. Step 2: Convert to fraction form
    220,491.20/330,736.80 = 141,759.20/x
  3. Step 3: Cross multiply
    220,491.20x = 330,736.80 × 141,759.20
  4. Step 4: Simplify right side
    220,491.20x = 46,884,984,178.56
  5. Step 5: Solve for x
    x = 46,884,984,178.56/220,491.20
  6. Step 6: Final answer
    x = 212,638.80

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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.