Home / 78,918.20-118,383.42-26,327.60

Finding the Fourth Proportional to 78,918.20, 118,383.42 and 26,327.60

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Solution

The fourth proportional to 78,918.20, 118,383.42 and 26,327.60 is: 39,493.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,918.20 : 118,383.42 = 26,327.60 : x
  2. Step 2: Convert to fraction form
    78,918.20/118,383.42 = 26,327.60/x
  3. Step 3: Cross multiply
    78,918.20x = 118,383.42 × 26,327.60
  4. Step 4: Simplify right side
    78,918.20x = 3,116,751,328.39
  5. Step 5: Solve for x
    x = 3,116,751,328.39/78,918.20
  6. Step 6: Final answer
    x = 39,493.44

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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.