Home / 149,013.26-205,640.74-81,031.58

Finding the Fourth Proportional to 149,013.26, 205,640.74 and 81,031.58

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Solution

The fourth proportional to 149,013.26, 205,640.74 and 81,031.58 is: 111,824.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,013.26 : 205,640.74 = 81,031.58 : x
  2. Step 2: Convert to fraction form
    149,013.26/205,640.74 = 81,031.58/x
  3. Step 3: Cross multiply
    149,013.26x = 205,640.74 × 81,031.58
  4. Step 4: Simplify right side
    149,013.26x = 16,663,394,074.57
  5. Step 5: Solve for x
    x = 16,663,394,074.57/149,013.26
  6. Step 6: Final answer
    x = 111,824.91

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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.