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Finding the Fourth Proportional to 61,136.20, 91,704.30 and 21,697.30

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Solution

The fourth proportional to 61,136.20, 91,704.30 and 21,697.30 is: 32,545.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,136.20 : 91,704.30 = 21,697.30 : x
  2. Step 2: Convert to fraction form
    61,136.20/91,704.30 = 21,697.30/x
  3. Step 3: Cross multiply
    61,136.20x = 91,704.30 × 21,697.30
  4. Step 4: Simplify right side
    61,136.20x = 1,989,735,708.39
  5. Step 5: Solve for x
    x = 1,989,735,708.39/61,136.20
  6. Step 6: Final answer
    x = 32,545.95

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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.