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Finding the Fourth Proportional to 172,067.70, 258,101.55 and 136,638.30

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Solution

The fourth proportional to 172,067.70, 258,101.55 and 136,638.30 is: 204,957.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,067.70 : 258,101.55 = 136,638.30 : x
  2. Step 2: Convert to fraction form
    172,067.70/258,101.55 = 136,638.30/x
  3. Step 3: Cross multiply
    172,067.70x = 258,101.55 × 136,638.30
  4. Step 4: Simplify right side
    172,067.70x = 35,266,557,019.37
  5. Step 5: Solve for x
    x = 35,266,557,019.37/172,067.70
  6. Step 6: Final answer
    x = 204,957.45

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1.5x scale

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.