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Finding the Fourth Proportional to 172,443.30, 258,511.05 and 67,237.80

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Solution

The fourth proportional to 172,443.30, 258,511.05 and 67,237.80 is: 100,796.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,443.30 : 258,511.05 = 67,237.80 : x
  2. Step 2: Convert to fraction form
    172,443.30/258,511.05 = 67,237.80/x
  3. Step 3: Cross multiply
    172,443.30x = 258,511.05 × 67,237.80
  4. Step 4: Simplify right side
    172,443.30x = 17,381,714,277.69
  5. Step 5: Solve for x
    x = 17,381,714,277.69/172,443.30
  6. Step 6: Final answer
    x = 100,796.69

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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.