Home / 68,111.38-102,170.91-20,728.01

Finding the Fourth Proportional to 68,111.38, 102,170.91 and 20,728.01

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Solution

The fourth proportional to 68,111.38, 102,170.91 and 20,728.01 is: 31,093.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,111.38 : 102,170.91 = 20,728.01 : x
  2. Step 2: Convert to fraction form
    68,111.38/102,170.91 = 20,728.01/x
  3. Step 3: Cross multiply
    68,111.38x = 102,170.91 × 20,728.01
  4. Step 4: Simplify right side
    68,111.38x = 2,117,799,899.62
  5. Step 5: Solve for x
    x = 2,117,799,899.62/68,111.38
  6. Step 6: Final answer
    x = 31,093.19

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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.