Home / 68,532.50-102,808.97-21,143.66

Finding the Fourth Proportional to 68,532.50, 102,808.97 and 21,143.66

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Solution

The fourth proportional to 68,532.50, 102,808.97 and 21,143.66 is: 31,718.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,532.50 : 102,808.97 = 21,143.66 : x
  2. Step 2: Convert to fraction form
    68,532.50/102,808.97 = 21,143.66/x
  3. Step 3: Cross multiply
    68,532.50x = 102,808.97 × 21,143.66
  4. Step 4: Simplify right side
    68,532.50x = 2,173,757,286.87
  5. Step 5: Solve for x
    x = 2,173,757,286.87/68,532.50
  6. Step 6: Final answer
    x = 31,718.64

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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.