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Finding the Fourth Proportional to 68,978.48, 95,193.09 and 38,763.69

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Solution

The fourth proportional to 68,978.48, 95,193.09 and 38,763.69 is: 53,495.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,978.48 : 95,193.09 = 38,763.69 : x
  2. Step 2: Convert to fraction form
    68,978.48/95,193.09 = 38,763.69/x
  3. Step 3: Cross multiply
    68,978.48x = 95,193.09 × 38,763.69
  4. Step 4: Simplify right side
    68,978.48x = 3,690,035,430.90
  5. Step 5: Solve for x
    x = 3,690,035,430.90/68,978.48
  6. Step 6: Final answer
    x = 53,495.46

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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.