Home / 120,915.12-166,859.44-67,198.72

Finding the Fourth Proportional to 120,915.12, 166,859.44 and 67,198.72

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Solution

The fourth proportional to 120,915.12, 166,859.44 and 67,198.72 is: 92,732.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,915.12 : 166,859.44 = 67,198.72 : x
  2. Step 2: Convert to fraction form
    120,915.12/166,859.44 = 67,198.72/x
  3. Step 3: Cross multiply
    120,915.12x = 166,859.44 × 67,198.72
  4. Step 4: Simplify right side
    120,915.12x = 11,212,740,787.92
  5. Step 5: Solve for x
    x = 11,212,740,787.92/120,915.12
  6. Step 6: Final answer
    x = 92,732.33

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1.5x scale

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.