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Finding the Fourth Proportional to 66,633.33, 99,965.70 and 21,654.54

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Solution

The fourth proportional to 66,633.33, 99,965.70 and 21,654.54 is: 32,486.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,633.33 : 99,965.70 = 21,654.54 : x
  2. Step 2: Convert to fraction form
    66,633.33/99,965.70 = 21,654.54/x
  3. Step 3: Cross multiply
    66,633.33x = 99,965.70 × 21,654.54
  4. Step 4: Simplify right side
    66,633.33x = 2,164,711,249.28
  5. Step 5: Solve for x
    x = 2,164,711,249.28/66,633.33
  6. Step 6: Final answer
    x = 32,486.91

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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.