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Finding the Fourth Proportional to 74,295.72, 111,447.36 and 21,709.44

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Solution

The fourth proportional to 74,295.72, 111,447.36 and 21,709.44 is: 32,565.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,295.72 : 111,447.36 = 21,709.44 : x
  2. Step 2: Convert to fraction form
    74,295.72/111,447.36 = 21,709.44/x
  3. Step 3: Cross multiply
    74,295.72x = 111,447.36 × 21,709.44
  4. Step 4: Simplify right side
    74,295.72x = 2,419,459,775.08
  5. Step 5: Solve for x
    x = 2,419,459,775.08/74,295.72
  6. Step 6: Final answer
    x = 32,565.26

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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.