Home / 78,121.41-117,188.22-25,536.21

Finding the Fourth Proportional to 78,121.41, 117,188.22 and 25,536.21

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Solution

The fourth proportional to 78,121.41, 117,188.22 and 25,536.21 is: 38,306.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,121.41 : 117,188.22 = 25,536.21 : x
  2. Step 2: Convert to fraction form
    78,121.41/117,188.22 = 25,536.21/x
  3. Step 3: Cross multiply
    78,121.41x = 117,188.22 × 25,536.21
  4. Step 4: Simplify right side
    78,121.41x = 2,992,542,995.45
  5. Step 5: Solve for x
    x = 2,992,542,995.45/78,121.41
  6. Step 6: Final answer
    x = 38,306.31

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1.5x scale

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.