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Finding the Fourth Proportional to 215,872.80, 323,420.40 and 132,669.60

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Solution

The fourth proportional to 215,872.80, 323,420.40 and 132,669.60 is: 198,765.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,872.80 : 323,420.40 = 132,669.60 : x
  2. Step 2: Convert to fraction form
    215,872.80/323,420.40 = 132,669.60/x
  3. Step 3: Cross multiply
    215,872.80x = 323,420.40 × 132,669.60
  4. Step 4: Simplify right side
    215,872.80x = 42,908,055,099.84
  5. Step 5: Solve for x
    x = 42,908,055,099.84/215,872.80
  6. Step 6: Final answer
    x = 198,765.45

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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.