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Finding the Fourth Proportional to 68,869.20, 103,332.60 and 22,136.40

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Solution

The fourth proportional to 68,869.20, 103,332.60 and 22,136.40 is: 33,213.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,869.20 : 103,332.60 = 22,136.40 : x
  2. Step 2: Convert to fraction form
    68,869.20/103,332.60 = 22,136.40/x
  3. Step 3: Cross multiply
    68,869.20x = 103,332.60 × 22,136.40
  4. Step 4: Simplify right side
    68,869.20x = 2,287,411,766.64
  5. Step 5: Solve for x
    x = 2,287,411,766.64/68,869.20
  6. Step 6: Final answer
    x = 33,213.86

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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.