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Finding the Fourth Proportional to 61,157.85, 91,745.91 and 21,711.66

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Solution

The fourth proportional to 61,157.85, 91,745.91 and 21,711.66 is: 32,570.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,157.85 : 91,745.91 = 21,711.66 : x
  2. Step 2: Convert to fraction form
    61,157.85/91,745.91 = 21,711.66/x
  3. Step 3: Cross multiply
    61,157.85x = 91,745.91 × 21,711.66
  4. Step 4: Simplify right side
    61,157.85x = 1,991,956,004.31
  5. Step 5: Solve for x
    x = 1,991,956,004.31/61,157.85
  6. Step 6: Final answer
    x = 32,570.73

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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.