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Finding the Fourth Proportional to 123,456.96, 170,388.66 and 72,497.58

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Solution

The fourth proportional to 123,456.96, 170,388.66 and 72,497.58 is: 100,057.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,456.96 : 170,388.66 = 72,497.58 : x
  2. Step 2: Convert to fraction form
    123,456.96/170,388.66 = 72,497.58/x
  3. Step 3: Cross multiply
    123,456.96x = 170,388.66 × 72,497.58
  4. Step 4: Simplify right side
    123,456.96x = 12,352,765,142.35
  5. Step 5: Solve for x
    x = 12,352,765,142.35/123,456.96
  6. Step 6: Final answer
    x = 100,057.26

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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.