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Finding the Fourth Proportional to 124,491.62, 171,796.20 and 72,813.71

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Solution

The fourth proportional to 124,491.62, 171,796.20 and 72,813.71 is: 100,481.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,491.62 : 171,796.20 = 72,813.71 : x
  2. Step 2: Convert to fraction form
    124,491.62/171,796.20 = 72,813.71/x
  3. Step 3: Cross multiply
    124,491.62x = 171,796.20 × 72,813.71
  4. Step 4: Simplify right side
    124,491.62x = 12,509,117,826.92
  5. Step 5: Solve for x
    x = 12,509,117,826.92/124,491.62
  6. Step 6: Final answer
    x = 100,481.61

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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.