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Finding the Fourth Proportional to 109,801.40, 164,855.70 and 68,329.40

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Solution

The fourth proportional to 109,801.40, 164,855.70 and 68,329.40 is: 102,589.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,801.40 : 164,855.70 = 68,329.40 : x
  2. Step 2: Convert to fraction form
    109,801.40/164,855.70 = 68,329.40/x
  3. Step 3: Cross multiply
    109,801.40x = 164,855.70 × 68,329.40
  4. Step 4: Simplify right side
    109,801.40x = 11,264,491,067.58
  5. Step 5: Solve for x
    x = 11,264,491,067.58/109,801.40
  6. Step 6: Final answer
    x = 102,589.69

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1.5x scale

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.