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Finding the Fourth Proportional to 64,851.89, 89,481.99 and 39,371.66

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Solution

The fourth proportional to 64,851.89, 89,481.99 and 39,371.66 is: 54,324.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,851.89 : 89,481.99 = 39,371.66 : x
  2. Step 2: Convert to fraction form
    64,851.89/89,481.99 = 39,371.66/x
  3. Step 3: Cross multiply
    64,851.89x = 89,481.99 × 39,371.66
  4. Step 4: Simplify right side
    64,851.89x = 3,523,054,710.11
  5. Step 5: Solve for x
    x = 3,523,054,710.11/64,851.89
  6. Step 6: Final answer
    x = 54,324.63

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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.