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Finding the Fourth Proportional to 120,915.77, 166,874.04 and 67,199.40

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Solution

The fourth proportional to 120,915.77, 166,874.04 and 67,199.40 is: 92,740.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,915.77 : 166,874.04 = 67,199.40 : x
  2. Step 2: Convert to fraction form
    120,915.77/166,874.04 = 67,199.40/x
  3. Step 3: Cross multiply
    120,915.77x = 166,874.04 × 67,199.40
  4. Step 4: Simplify right side
    120,915.77x = 11,213,835,363.58
  5. Step 5: Solve for x
    x = 11,213,835,363.58/120,915.77
  6. Step 6: Final answer
    x = 92,740.89

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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.