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Finding the Fourth Proportional to 120,787.21, 166,691.19 and 69,798.25

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Solution

The fourth proportional to 120,787.21, 166,691.19 and 69,798.25 is: 96,324.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,787.21 : 166,691.19 = 69,798.25 : x
  2. Step 2: Convert to fraction form
    120,787.21/166,691.19 = 69,798.25/x
  3. Step 3: Cross multiply
    120,787.21x = 166,691.19 × 69,798.25
  4. Step 4: Simplify right side
    120,787.21x = 11,634,753,352.42
  5. Step 5: Solve for x
    x = 11,634,753,352.42/120,787.21
  6. Step 6: Final answer
    x = 96,324.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.