Home / 107,942.90-149,002.20-81,163.16

Finding the Fourth Proportional to 107,942.90, 149,002.20 and 81,163.16

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Solution

The fourth proportional to 107,942.90, 149,002.20 and 81,163.16 is: 112,035.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,942.90 : 149,002.20 = 81,163.16 : x
  2. Step 2: Convert to fraction form
    107,942.90/149,002.20 = 81,163.16/x
  3. Step 3: Cross multiply
    107,942.90x = 149,002.20 × 81,163.16
  4. Step 4: Simplify right side
    107,942.90x = 12,093,489,398.95
  5. Step 5: Solve for x
    x = 12,093,489,398.95/107,942.90
  6. Step 6: Final answer
    x = 112,035.99

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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.