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Finding the Fourth Proportional to 64,839.90, 89,486.76 and 36,164.25

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Solution

The fourth proportional to 64,839.90, 89,486.76 and 36,164.25 is: 49,910.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,839.90 : 89,486.76 = 36,164.25 : x
  2. Step 2: Convert to fraction form
    64,839.90/89,486.76 = 36,164.25/x
  3. Step 3: Cross multiply
    64,839.90x = 89,486.76 × 36,164.25
  4. Step 4: Simplify right side
    64,839.90x = 3,236,221,560.33
  5. Step 5: Solve for x
    x = 3,236,221,560.33/64,839.90
  6. Step 6: Final answer
    x = 49,910.96

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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.