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Finding the Fourth Proportional to 172,087.80, 258,131.70 and 161,719.80

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Solution

The fourth proportional to 172,087.80, 258,131.70 and 161,719.80 is: 242,579.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,087.80 : 258,131.70 = 161,719.80 : x
  2. Step 2: Convert to fraction form
    172,087.80/258,131.70 = 161,719.80/x
  3. Step 3: Cross multiply
    172,087.80x = 258,131.70 × 161,719.80
  4. Step 4: Simplify right side
    172,087.80x = 41,745,006,897.66
  5. Step 5: Solve for x
    x = 41,745,006,897.66/172,087.80
  6. Step 6: Final answer
    x = 242,579.70

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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.