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Finding the Fourth Proportional to 118,621.98, 163,691.28 and 64,896.30

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Solution

The fourth proportional to 118,621.98, 163,691.28 and 64,896.30 is: 89,553.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,621.98 : 163,691.28 = 64,896.30 : x
  2. Step 2: Convert to fraction form
    118,621.98/163,691.28 = 64,896.30/x
  3. Step 3: Cross multiply
    118,621.98x = 163,691.28 × 64,896.30
  4. Step 4: Simplify right side
    118,621.98x = 10,622,958,414.26
  5. Step 5: Solve for x
    x = 10,622,958,414.26/118,621.98
  6. Step 6: Final answer
    x = 89,553.04

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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.