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Finding the Fourth Proportional to 64,701.78, 89,286.72 and 36,021.44

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Solution

The fourth proportional to 64,701.78, 89,286.72 and 36,021.44 is: 49,708.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,701.78 : 89,286.72 = 36,021.44 : x
  2. Step 2: Convert to fraction form
    64,701.78/89,286.72 = 36,021.44/x
  3. Step 3: Cross multiply
    64,701.78x = 89,286.72 × 36,021.44
  4. Step 4: Simplify right side
    64,701.78x = 3,216,236,227.28
  5. Step 5: Solve for x
    x = 3,216,236,227.28/64,701.78
  6. Step 6: Final answer
    x = 49,708.62

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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.