Home / 68,780.21-103,185.17-21,394.40

Finding the Fourth Proportional to 68,780.21, 103,185.17 and 21,394.40

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Solution

The fourth proportional to 68,780.21, 103,185.17 and 21,394.40 is: 32,096.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,780.21 : 103,185.17 = 21,394.40 : x
  2. Step 2: Convert to fraction form
    68,780.21/103,185.17 = 21,394.40/x
  3. Step 3: Cross multiply
    68,780.21x = 103,185.17 × 21,394.40
  4. Step 4: Simplify right side
    68,780.21x = 2,207,585,112.50
  5. Step 5: Solve for x
    x = 2,207,585,112.50/68,780.21
  6. Step 6: Final answer
    x = 32,096.22

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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.