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Finding the Fourth Proportional to 220,620.54, 330,640.00 and 87,428.13

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Solution

The fourth proportional to 220,620.54, 330,640.00 and 87,428.13 is: 131,026.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,620.54 : 330,640.00 = 87,428.13 : x
  2. Step 2: Convert to fraction form
    220,620.54/330,640.00 = 87,428.13/x
  3. Step 3: Cross multiply
    220,620.54x = 330,640.00 × 87,428.13
  4. Step 4: Simplify right side
    220,620.54x = 28,907,238,480.40
  5. Step 5: Solve for x
    x = 28,907,238,480.40/220,620.54
  6. Step 6: Final answer
    x = 131,026.96

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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.