Home / 149,105.84-205,763.79-81,121.26

Finding the Fourth Proportional to 149,105.84, 205,763.79 and 81,121.26

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Solution

The fourth proportional to 149,105.84, 205,763.79 and 81,121.26 is: 111,946.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,105.84 : 205,763.79 = 81,121.26 : x
  2. Step 2: Convert to fraction form
    149,105.84/205,763.79 = 81,121.26/x
  3. Step 3: Cross multiply
    149,105.84x = 205,763.79 × 81,121.26
  4. Step 4: Simplify right side
    149,105.84x = 16,691,818,114.93
  5. Step 5: Solve for x
    x = 16,691,818,114.93/149,105.84
  6. Step 6: Final answer
    x = 111,946.11

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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.