Home / 78,376.23-117,304.38-71,372.34

Finding the Fourth Proportional to 78,376.23, 117,304.38 and 71,372.34

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Solution

The fourth proportional to 78,376.23, 117,304.38 and 71,372.34 is: 106,821.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,376.23 : 117,304.38 = 71,372.34 : x
  2. Step 2: Convert to fraction form
    78,376.23/117,304.38 = 71,372.34/x
  3. Step 3: Cross multiply
    78,376.23x = 117,304.38 × 71,372.34
  4. Step 4: Simplify right side
    78,376.23x = 8,372,288,092.85
  5. Step 5: Solve for x
    x = 8,372,288,092.85/78,376.23
  6. Step 6: Final answer
    x = 106,821.78

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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.