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Finding the Fourth Proportional to 68,380.82, 102,579.42 and 64,648.34

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Solution

The fourth proportional to 68,380.82, 102,579.42 and 64,648.34 is: 96,980.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,380.82 : 102,579.42 = 64,648.34 : x
  2. Step 2: Convert to fraction form
    68,380.82/102,579.42 = 64,648.34/x
  3. Step 3: Cross multiply
    68,380.82x = 102,579.42 × 64,648.34
  4. Step 4: Simplify right side
    68,380.82x = 6,631,589,221.16
  5. Step 5: Solve for x
    x = 6,631,589,221.16/68,380.82
  6. Step 6: Final answer
    x = 96,980.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.