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Finding the Fourth Proportional to 68,954.22, 103,378.68 and 31,488.29

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Solution

The fourth proportional to 68,954.22, 103,378.68 and 31,488.29 is: 47,208.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,954.22 : 103,378.68 = 31,488.29 : x
  2. Step 2: Convert to fraction form
    68,954.22/103,378.68 = 31,488.29/x
  3. Step 3: Cross multiply
    68,954.22x = 103,378.68 × 31,488.29
  4. Step 4: Simplify right side
    68,954.22x = 3,255,217,338.76
  5. Step 5: Solve for x
    x = 3,255,217,338.76/68,954.22
  6. Step 6: Final answer
    x = 47,208.38

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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.