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Finding the Fourth Proportional to 220,443.20, 330,664.80 and 141,711.20

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Solution

The fourth proportional to 220,443.20, 330,664.80 and 141,711.20 is: 212,566.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,443.20 : 330,664.80 = 141,711.20 : x
  2. Step 2: Convert to fraction form
    220,443.20/330,664.80 = 141,711.20/x
  3. Step 3: Cross multiply
    220,443.20x = 330,664.80 × 141,711.20
  4. Step 4: Simplify right side
    220,443.20x = 46,858,905,605.76
  5. Step 5: Solve for x
    x = 46,858,905,605.76/220,443.20
  6. Step 6: Final answer
    x = 212,566.80

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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.