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Finding the Fourth Proportional to 78,918.48, 118,383.80 and 26,327.88

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Solution

The fourth proportional to 78,918.48, 118,383.80 and 26,327.88 is: 39,493.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,918.48 : 118,383.80 = 26,327.88 : x
  2. Step 2: Convert to fraction form
    78,918.48/118,383.80 = 26,327.88/x
  3. Step 3: Cross multiply
    78,918.48x = 118,383.80 × 26,327.88
  4. Step 4: Simplify right side
    78,918.48x = 3,116,794,348.70
  5. Step 5: Solve for x
    x = 3,116,794,348.70/78,918.48
  6. Step 6: Final answer
    x = 39,493.85

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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.