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Finding the Fourth Proportional to 78,967.38, 108,904.44 and 65,517.33

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Solution

The fourth proportional to 78,967.38, 108,904.44 and 65,517.33 is: 90,355.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,967.38 : 108,904.44 = 65,517.33 : x
  2. Step 2: Convert to fraction form
    78,967.38/108,904.44 = 65,517.33/x
  3. Step 3: Cross multiply
    78,967.38x = 108,904.44 × 65,517.33
  4. Step 4: Simplify right side
    78,967.38x = 7,135,128,133.95
  5. Step 5: Solve for x
    x = 7,135,128,133.95/78,967.38
  6. Step 6: Final answer
    x = 90,355.39

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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.