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Finding the Fourth Proportional to 117,808.68, 176,682 and 80,361.78

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Solution

The fourth proportional to 117,808.68, 176,682 and 80,361.78 is: 120,521.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,808.68 : 176,682 = 80,361.78 : x
  2. Step 2: Convert to fraction form
    117,808.68/176,682 = 80,361.78/x
  3. Step 3: Cross multiply
    117,808.68x = 176,682 × 80,361.78
  4. Step 4: Simplify right side
    117,808.68x = 14,198,480,013.96
  5. Step 5: Solve for x
    x = 14,198,480,013.96/117,808.68
  6. Step 6: Final answer
    x = 120,521.51

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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.