Home / 149,124.82-205,786.08-81,142.06

Finding the Fourth Proportional to 149,124.82, 205,786.08 and 81,142.06

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Solution

The fourth proportional to 149,124.82, 205,786.08 and 81,142.06 is: 111,972.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,124.82 : 205,786.08 = 81,142.06 : x
  2. Step 2: Convert to fraction form
    149,124.82/205,786.08 = 81,142.06/x
  3. Step 3: Cross multiply
    149,124.82x = 205,786.08 × 81,142.06
  4. Step 4: Simplify right side
    149,124.82x = 16,697,906,450.52
  5. Step 5: Solve for x
    x = 16,697,906,450.52/149,124.82
  6. Step 6: Final answer
    x = 111,972.68

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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.