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Finding the Fourth Proportional to 68,470.31, 102,705.47 and 21,723.19

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Solution

The fourth proportional to 68,470.31, 102,705.47 and 21,723.19 is: 32,584.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,470.31 : 102,705.47 = 21,723.19 : x
  2. Step 2: Convert to fraction form
    68,470.31/102,705.47 = 21,723.19/x
  3. Step 3: Cross multiply
    68,470.31x = 102,705.47 × 21,723.19
  4. Step 4: Simplify right side
    68,470.31x = 2,231,090,154.93
  5. Step 5: Solve for x
    x = 2,231,090,154.93/68,470.31
  6. Step 6: Final answer
    x = 32,584.78

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Similar ratio
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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.