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Finding the Fourth Proportional to 262,723.59, 394,140.76 and 85,216.79

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Solution

The fourth proportional to 262,723.59, 394,140.76 and 85,216.79 is: 127,843.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,723.59 : 394,140.76 = 85,216.79 : x
  2. Step 2: Convert to fraction form
    262,723.59/394,140.76 = 85,216.79/x
  3. Step 3: Cross multiply
    262,723.59x = 394,140.76 × 85,216.79
  4. Step 4: Simplify right side
    262,723.59x = 33,587,411,147.67
  5. Step 5: Solve for x
    x = 33,587,411,147.67/262,723.59
  6. Step 6: Final answer
    x = 127,843.15

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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.