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Finding the Fourth Proportional to 66,611.30, 99,932.66 and 21,632.51

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Solution

The fourth proportional to 66,611.30, 99,932.66 and 21,632.51 is: 32,453.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,611.30 : 99,932.66 = 21,632.51 : x
  2. Step 2: Convert to fraction form
    66,611.30/99,932.66 = 21,632.51/x
  3. Step 3: Cross multiply
    66,611.30x = 99,932.66 × 21,632.51
  4. Step 4: Simplify right side
    66,611.30x = 2,161,794,269.35
  5. Step 5: Solve for x
    x = 2,161,794,269.35/66,611.30
  6. Step 6: Final answer
    x = 32,453.87

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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.