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Finding the Fourth Proportional to 220,513.76, 330,848.40 and 80,286.56

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Solution

The fourth proportional to 220,513.76, 330,848.40 and 80,286.56 is: 120,458.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,513.76 : 330,848.40 = 80,286.56 : x
  2. Step 2: Convert to fraction form
    220,513.76/330,848.40 = 80,286.56/x
  3. Step 3: Cross multiply
    220,513.76x = 330,848.40 × 80,286.56
  4. Step 4: Simplify right side
    220,513.76x = 26,562,679,917.50
  5. Step 5: Solve for x
    x = 26,562,679,917.50/220,513.76
  6. Step 6: Final answer
    x = 120,458.15

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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.