Home / 78,076.87-107,745.18-42,266.09

Finding the Fourth Proportional to 78,076.87, 107,745.18 and 42,266.09

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Solution

The fourth proportional to 78,076.87, 107,745.18 and 42,266.09 is: 58,326.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,076.87 : 107,745.18 = 42,266.09 : x
  2. Step 2: Convert to fraction form
    78,076.87/107,745.18 = 42,266.09/x
  3. Step 3: Cross multiply
    78,076.87x = 107,745.18 × 42,266.09
  4. Step 4: Simplify right side
    78,076.87x = 4,553,967,474.95
  5. Step 5: Solve for x
    x = 4,553,967,474.95/78,076.87
  6. Step 6: Final answer
    x = 58,326.72

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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.