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Finding the Fourth Proportional to 120,099.66, 179,903.40 and 67,398.42

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Solution

The fourth proportional to 120,099.66, 179,903.40 and 67,398.42 is: 100,959.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,099.66 : 179,903.40 = 67,398.42 : x
  2. Step 2: Convert to fraction form
    120,099.66/179,903.40 = 67,398.42/x
  3. Step 3: Cross multiply
    120,099.66x = 179,903.40 × 67,398.42
  4. Step 4: Simplify right side
    120,099.66x = 12,125,204,912.63
  5. Step 5: Solve for x
    x = 12,125,204,912.63/120,099.66
  6. Step 6: Final answer
    x = 100,959.53

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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.