Home / 78,067.31-107,732.90-42,257.21

Finding the Fourth Proportional to 78,067.31, 107,732.90 and 42,257.21

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Solution

The fourth proportional to 78,067.31, 107,732.90 and 42,257.21 is: 58,314.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,067.31 : 107,732.90 = 42,257.21 : x
  2. Step 2: Convert to fraction form
    78,067.31/107,732.90 = 42,257.21/x
  3. Step 3: Cross multiply
    78,067.31x = 107,732.90 × 42,257.21
  4. Step 4: Simplify right side
    78,067.31x = 4,552,491,346.19
  5. Step 5: Solve for x
    x = 4,552,491,346.19/78,067.31
  6. Step 6: Final answer
    x = 58,314.95

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1.5x scale

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.