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Finding the Fourth Proportional to 68,651.16, 102,981.42 and 21,907.56

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Solution

The fourth proportional to 68,651.16, 102,981.42 and 21,907.56 is: 32,862.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,651.16 : 102,981.42 = 21,907.56 : x
  2. Step 2: Convert to fraction form
    68,651.16/102,981.42 = 21,907.56/x
  3. Step 3: Cross multiply
    68,651.16x = 102,981.42 × 21,907.56
  4. Step 4: Simplify right side
    68,651.16x = 2,256,071,637.54
  5. Step 5: Solve for x
    x = 2,256,071,637.54/68,651.16
  6. Step 6: Final answer
    x = 32,862.83

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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.