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Finding the Fourth Proportional to 220,089.96, 330,091.20 and 107,721.90

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Solution

The fourth proportional to 220,089.96, 330,091.20 and 107,721.90 is: 161,561.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,089.96 : 330,091.20 = 107,721.90 : x
  2. Step 2: Convert to fraction form
    220,089.96/330,091.20 = 107,721.90/x
  3. Step 3: Cross multiply
    220,089.96x = 330,091.20 × 107,721.90
  4. Step 4: Simplify right side
    220,089.96x = 35,558,051,237.28
  5. Step 5: Solve for x
    x = 35,558,051,237.28/220,089.96
  6. Step 6: Final answer
    x = 161,561.44

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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.