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Finding the Fourth Proportional to 64,908.25, 89,583.11 and 39,772.33

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Solution

The fourth proportional to 64,908.25, 89,583.11 and 39,772.33 is: 54,891.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,908.25 : 89,583.11 = 39,772.33 : x
  2. Step 2: Convert to fraction form
    64,908.25/89,583.11 = 39,772.33/x
  3. Step 3: Cross multiply
    64,908.25x = 89,583.11 × 39,772.33
  4. Step 4: Simplify right side
    64,908.25x = 3,562,929,013.35
  5. Step 5: Solve for x
    x = 3,562,929,013.35/64,908.25
  6. Step 6: Final answer
    x = 54,891.77

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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.