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Finding the Fourth Proportional to 64,982.88, 89,674.56 and 36,691.20

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Solution

The fourth proportional to 64,982.88, 89,674.56 and 36,691.20 is: 50,632.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,982.88 : 89,674.56 = 36,691.20 : x
  2. Step 2: Convert to fraction form
    64,982.88/89,674.56 = 36,691.20/x
  3. Step 3: Cross multiply
    64,982.88x = 89,674.56 × 36,691.20
  4. Step 4: Simplify right side
    64,982.88x = 3,290,267,215.87
  5. Step 5: Solve for x
    x = 3,290,267,215.87/64,982.88
  6. Step 6: Final answer
    x = 50,632.83

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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.