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Finding the Fourth Proportional to 68,664.96, 102,957.72 and 21,267.39

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Solution

The fourth proportional to 68,664.96, 102,957.72 and 21,267.39 is: 31,888.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,664.96 : 102,957.72 = 21,267.39 : x
  2. Step 2: Convert to fraction form
    68,664.96/102,957.72 = 21,267.39/x
  3. Step 3: Cross multiply
    68,664.96x = 102,957.72 × 21,267.39
  4. Step 4: Simplify right side
    68,664.96x = 2,189,641,984.75
  5. Step 5: Solve for x
    x = 2,189,641,984.75/68,664.96
  6. Step 6: Final answer
    x = 31,888.78

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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.