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Finding the Fourth Proportional to 65,369.28, 90,197.61 and 43,890.21

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Solution

The fourth proportional to 65,369.28, 90,197.61 and 43,890.21 is: 60,560.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,369.28 : 90,197.61 = 43,890.21 : x
  2. Step 2: Convert to fraction form
    65,369.28/90,197.61 = 43,890.21/x
  3. Step 3: Cross multiply
    65,369.28x = 90,197.61 × 43,890.21
  4. Step 4: Simplify right side
    65,369.28x = 3,958,792,044.40
  5. Step 5: Solve for x
    x = 3,958,792,044.40/65,369.28
  6. Step 6: Final answer
    x = 60,560.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.