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Finding the Fourth Proportional to 74,447.40, 111,660.30 and 21,851.40

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Solution

The fourth proportional to 74,447.40, 111,660.30 and 21,851.40 is: 32,773.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,447.40 : 111,660.30 = 21,851.40 : x
  2. Step 2: Convert to fraction form
    74,447.40/111,660.30 = 21,851.40/x
  3. Step 3: Cross multiply
    74,447.40x = 111,660.30 × 21,851.40
  4. Step 4: Simplify right side
    74,447.40x = 2,439,933,879.42
  5. Step 5: Solve for x
    x = 2,439,933,879.42/74,447.40
  6. Step 6: Final answer
    x = 32,773.93

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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.