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Finding the Fourth Proportional to 68,696.97, 103,060.15 and 21,311.04

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Solution

The fourth proportional to 68,696.97, 103,060.15 and 21,311.04 is: 31,971.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,696.97 : 103,060.15 = 21,311.04 : x
  2. Step 2: Convert to fraction form
    68,696.97/103,060.15 = 21,311.04/x
  3. Step 3: Cross multiply
    68,696.97x = 103,060.15 × 21,311.04
  4. Step 4: Simplify right side
    68,696.97x = 2,196,318,979.06
  5. Step 5: Solve for x
    x = 2,196,318,979.06/68,696.97
  6. Step 6: Final answer
    x = 31,971.12

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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.