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Finding the Fourth Proportional to 172,104.73, 258,056.86 and 66,800.68

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Solution

The fourth proportional to 172,104.73, 258,056.86 and 66,800.68 is: 100,162.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,104.73 : 258,056.86 = 66,800.68 : x
  2. Step 2: Convert to fraction form
    172,104.73/258,056.86 = 66,800.68/x
  3. Step 3: Cross multiply
    172,104.73x = 258,056.86 × 66,800.68
  4. Step 4: Simplify right side
    172,104.73x = 17,238,373,726.66
  5. Step 5: Solve for x
    x = 17,238,373,726.66/172,104.73
  6. Step 6: Final answer
    x = 100,162.11

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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.