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Finding the Fourth Proportional to 71,279.78, 106,913.38 and 21,371.02

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Solution

The fourth proportional to 71,279.78, 106,913.38 and 21,371.02 is: 32,054.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,279.78 : 106,913.38 = 21,371.02 : x
  2. Step 2: Convert to fraction form
    71,279.78/106,913.38 = 21,371.02/x
  3. Step 3: Cross multiply
    71,279.78x = 106,913.38 × 21,371.02
  4. Step 4: Simplify right side
    71,279.78x = 2,284,847,982.25
  5. Step 5: Solve for x
    x = 2,284,847,982.25/71,279.78
  6. Step 6: Final answer
    x = 32,054.64

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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.