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Finding the Fourth Proportional to 57,379.40, 86,074.40 and 22,321.72

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Solution

The fourth proportional to 57,379.40, 86,074.40 and 22,321.72 is: 33,484.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,379.40 : 86,074.40 = 22,321.72 : x
  2. Step 2: Convert to fraction form
    57,379.40/86,074.40 = 22,321.72/x
  3. Step 3: Cross multiply
    57,379.40x = 86,074.40 × 22,321.72
  4. Step 4: Simplify right side
    57,379.40x = 1,921,328,655.97
  5. Step 5: Solve for x
    x = 1,921,328,655.97/57,379.40
  6. Step 6: Final answer
    x = 33,484.64

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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.