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Finding the Fourth Proportional to 64,721.26, 89,294.48 and 36,421.48

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Solution

The fourth proportional to 64,721.26, 89,294.48 and 36,421.48 is: 50,249.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,721.26 : 89,294.48 = 36,421.48 : x
  2. Step 2: Convert to fraction form
    64,721.26/89,294.48 = 36,421.48/x
  3. Step 3: Cross multiply
    64,721.26x = 89,294.48 × 36,421.48
  4. Step 4: Simplify right side
    64,721.26x = 3,252,236,488.85
  5. Step 5: Solve for x
    x = 3,252,236,488.85/64,721.26
  6. Step 6: Final answer
    x = 50,249.90

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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.