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Finding the Fourth Proportional to 172,570.40, 258,855.60 and 165,042.80

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Solution

The fourth proportional to 172,570.40, 258,855.60 and 165,042.80 is: 247,564.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,570.40 : 258,855.60 = 165,042.80 : x
  2. Step 2: Convert to fraction form
    172,570.40/258,855.60 = 165,042.80/x
  3. Step 3: Cross multiply
    172,570.40x = 258,855.60 × 165,042.80
  4. Step 4: Simplify right side
    172,570.40x = 42,722,253,019.68
  5. Step 5: Solve for x
    x = 42,722,253,019.68/172,570.40
  6. Step 6: Final answer
    x = 247,564.20

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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.