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Finding the Fourth Proportional to 66,779.64, 100,185.66 and 20,032.52

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Solution

The fourth proportional to 66,779.64, 100,185.66 and 20,032.52 is: 30,053.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,779.64 : 100,185.66 = 20,032.52 : x
  2. Step 2: Convert to fraction form
    66,779.64/100,185.66 = 20,032.52/x
  3. Step 3: Cross multiply
    66,779.64x = 100,185.66 × 20,032.52
  4. Step 4: Simplify right side
    66,779.64x = 2,006,970,736.73
  5. Step 5: Solve for x
    x = 2,006,970,736.73/66,779.64
  6. Step 6: Final answer
    x = 30,053.63

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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.