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Finding the Fourth Proportional to 68,141.25, 102,212.79 and 21,394.13

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Solution

The fourth proportional to 68,141.25, 102,212.79 and 21,394.13 is: 32,091.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,141.25 : 102,212.79 = 21,394.13 : x
  2. Step 2: Convert to fraction form
    68,141.25/102,212.79 = 21,394.13/x
  3. Step 3: Cross multiply
    68,141.25x = 102,212.79 × 21,394.13
  4. Step 4: Simplify right side
    68,141.25x = 2,186,753,125.63
  5. Step 5: Solve for x
    x = 2,186,753,125.63/68,141.25
  6. Step 6: Final answer
    x = 32,091.47

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1.5x scale

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.