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Finding the Fourth Proportional to 262,718.70, 394,133.44 and 85,211.90

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Solution

The fourth proportional to 262,718.70, 394,133.44 and 85,211.90 is: 127,835.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,718.70 : 394,133.44 = 85,211.90 : x
  2. Step 2: Convert to fraction form
    262,718.70/394,133.44 = 85,211.90/x
  3. Step 3: Cross multiply
    262,718.70x = 394,133.44 × 85,211.90
  4. Step 4: Simplify right side
    262,718.70x = 33,584,859,275.94
  5. Step 5: Solve for x
    x = 33,584,859,275.94/262,718.70
  6. Step 6: Final answer
    x = 127,835.82

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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.