Home / 78,278.26-117,436.59-36,676.66

Finding the Fourth Proportional to 78,278.26, 117,436.59 and 36,676.66

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Solution

The fourth proportional to 78,278.26, 117,436.59 and 36,676.66 is: 55,023.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,278.26 : 117,436.59 = 36,676.66 : x
  2. Step 2: Convert to fraction form
    78,278.26/117,436.59 = 36,676.66/x
  3. Step 3: Cross multiply
    78,278.26x = 117,436.59 × 36,676.66
  4. Step 4: Simplify right side
    78,278.26x = 4,307,181,882.99
  5. Step 5: Solve for x
    x = 4,307,181,882.99/78,278.26
  6. Step 6: Final answer
    x = 55,023.99

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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.