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Finding the Fourth Proportional to 68,876.10, 103,315.41 and 18,955.92

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Solution

The fourth proportional to 68,876.10, 103,315.41 and 18,955.92 is: 28,434.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,876.10 : 103,315.41 = 18,955.92 : x
  2. Step 2: Convert to fraction form
    68,876.10/103,315.41 = 18,955.92/x
  3. Step 3: Cross multiply
    68,876.10x = 103,315.41 × 18,955.92
  4. Step 4: Simplify right side
    68,876.10x = 1,958,438,646.73
  5. Step 5: Solve for x
    x = 1,958,438,646.73/68,876.10
  6. Step 6: Final answer
    x = 28,434.23

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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.