Home / 68,111.75-102,171.45-20,728.38

Finding the Fourth Proportional to 68,111.75, 102,171.45 and 20,728.38

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Solution

The fourth proportional to 68,111.75, 102,171.45 and 20,728.38 is: 31,093.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,111.75 : 102,171.45 = 20,728.38 : x
  2. Step 2: Convert to fraction form
    68,111.75/102,171.45 = 20,728.38/x
  3. Step 3: Cross multiply
    68,111.75x = 102,171.45 × 20,728.38
  4. Step 4: Simplify right side
    68,111.75x = 2,117,848,640.75
  5. Step 5: Solve for x
    x = 2,117,848,640.75/68,111.75
  6. Step 6: Final answer
    x = 31,093.74

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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.