Home / 68,138.15-102,223.71-21,391.02

Finding the Fourth Proportional to 68,138.15, 102,223.71 and 21,391.02

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Solution

The fourth proportional to 68,138.15, 102,223.71 and 21,391.02 is: 32,091.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,138.15 : 102,223.71 = 21,391.02 : x
  2. Step 2: Convert to fraction form
    68,138.15/102,223.71 = 21,391.02/x
  3. Step 3: Cross multiply
    68,138.15x = 102,223.71 × 21,391.02
  4. Step 4: Simplify right side
    68,138.15x = 2,186,669,425.08
  5. Step 5: Solve for x
    x = 2,186,669,425.08/68,138.15
  6. Step 6: Final answer
    x = 32,091.71

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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.