Home / 68,111.81-102,171.56-20,728.45

Finding the Fourth Proportional to 68,111.81, 102,171.56 and 20,728.45

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Solution

The fourth proportional to 68,111.81, 102,171.56 and 20,728.45 is: 31,093.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,111.81 : 102,171.56 = 20,728.45 : x
  2. Step 2: Convert to fraction form
    68,111.81/102,171.56 = 20,728.45/x
  3. Step 3: Cross multiply
    68,111.81x = 102,171.56 × 20,728.45
  4. Step 4: Simplify right side
    68,111.81x = 2,117,858,072.88
  5. Step 5: Solve for x
    x = 2,117,858,072.88/68,111.81
  6. Step 6: Final answer
    x = 31,093.85

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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.