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Finding the Fourth Proportional to 262,640.92, 394,023.76 and 85,148.06

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Solution

The fourth proportional to 262,640.92, 394,023.76 and 85,148.06 is: 127,742.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,640.92 : 394,023.76 = 85,148.06 : x
  2. Step 2: Convert to fraction form
    262,640.92/394,023.76 = 85,148.06/x
  3. Step 3: Cross multiply
    262,640.92x = 394,023.76 × 85,148.06
  4. Step 4: Simplify right side
    262,640.92x = 33,550,358,757.91
  5. Step 5: Solve for x
    x = 33,550,358,757.91/262,640.92
  6. Step 6: Final answer
    x = 127,742.31

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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.