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Finding the Fourth Proportional to 220,530.98, 330,905.82 and 87,408.30

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Solution

The fourth proportional to 220,530.98, 330,905.82 and 87,408.30 is: 131,155.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,530.98 : 330,905.82 = 87,408.30 : x
  2. Step 2: Convert to fraction form
    220,530.98/330,905.82 = 87,408.30/x
  3. Step 3: Cross multiply
    220,530.98x = 330,905.82 × 87,408.30
  4. Step 4: Simplify right side
    220,530.98x = 28,923,915,186.31
  5. Step 5: Solve for x
    x = 28,923,915,186.31/220,530.98
  6. Step 6: Final answer
    x = 131,155.79

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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.