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Finding the Fourth Proportional to 172,046.70, 258,085.98 and 66,873.60

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Solution

The fourth proportional to 172,046.70, 258,085.98 and 66,873.60 is: 100,316.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,046.70 : 258,085.98 = 66,873.60 : x
  2. Step 2: Convert to fraction form
    172,046.70/258,085.98 = 66,873.60/x
  3. Step 3: Cross multiply
    172,046.70x = 258,085.98 × 66,873.60
  4. Step 4: Simplify right side
    172,046.70x = 17,259,138,592.13
  5. Step 5: Solve for x
    x = 17,259,138,592.13/172,046.70
  6. Step 6: Final answer
    x = 100,316.59

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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.