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Finding the Fourth Proportional to 74,379.72, 111,568.14 and 21,788.04

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Solution

The fourth proportional to 74,379.72, 111,568.14 and 21,788.04 is: 32,681.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,379.72 : 111,568.14 = 21,788.04 : x
  2. Step 2: Convert to fraction form
    74,379.72/111,568.14 = 21,788.04/x
  3. Step 3: Cross multiply
    74,379.72x = 111,568.14 × 21,788.04
  4. Step 4: Simplify right side
    74,379.72x = 2,430,851,097.05
  5. Step 5: Solve for x
    x = 2,430,851,097.05/74,379.72
  6. Step 6: Final answer
    x = 32,681.64

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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.