Home / 78,278.96-117,393.86-25,676.12

Finding the Fourth Proportional to 78,278.96, 117,393.86 and 25,676.12

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Solution

The fourth proportional to 78,278.96, 117,393.86 and 25,676.12 is: 38,506.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,278.96 : 117,393.86 = 25,676.12 : x
  2. Step 2: Convert to fraction form
    78,278.96/117,393.86 = 25,676.12/x
  3. Step 3: Cross multiply
    78,278.96x = 117,393.86 × 25,676.12
  4. Step 4: Simplify right side
    78,278.96x = 3,014,218,836.62
  5. Step 5: Solve for x
    x = 3,014,218,836.62/78,278.96
  6. Step 6: Final answer
    x = 38,506.12

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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.