Home / 203,918.50-305,942.75-85,558.06

Finding the Fourth Proportional to 203,918.50, 305,942.75 and 85,558.06

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Solution

The fourth proportional to 203,918.50, 305,942.75 and 85,558.06 is: 128,364.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,918.50 : 305,942.75 = 85,558.06 : x
  2. Step 2: Convert to fraction form
    203,918.50/305,942.75 = 85,558.06/x
  3. Step 3: Cross multiply
    203,918.50x = 305,942.75 × 85,558.06
  4. Step 4: Simplify right side
    203,918.50x = 26,175,868,161.07
  5. Step 5: Solve for x
    x = 26,175,868,161.07/203,918.50
  6. Step 6: Final answer
    x = 128,364.36

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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.