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Finding the Fourth Proportional to 68,103.51, 102,171.67 and 21,356.38

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Solution

The fourth proportional to 68,103.51, 102,171.67 and 21,356.38 is: 32,039.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,103.51 : 102,171.67 = 21,356.38 : x
  2. Step 2: Convert to fraction form
    68,103.51/102,171.67 = 21,356.38/x
  3. Step 3: Cross multiply
    68,103.51x = 102,171.67 × 21,356.38
  4. Step 4: Simplify right side
    68,103.51x = 2,182,017,084.08
  5. Step 5: Solve for x
    x = 2,182,017,084.08/68,103.51
  6. Step 6: Final answer
    x = 32,039.72

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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.