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Finding the Fourth Proportional to 172,005.40, 257,789.40 and 83,067.40

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Solution

The fourth proportional to 172,005.40, 257,789.40 and 83,067.40 is: 124,495.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,005.40 : 257,789.40 = 83,067.40 : x
  2. Step 2: Convert to fraction form
    172,005.40/257,789.40 = 83,067.40/x
  3. Step 3: Cross multiply
    172,005.40x = 257,789.40 × 83,067.40
  4. Step 4: Simplify right side
    172,005.40x = 21,413,895,205.56
  5. Step 5: Solve for x
    x = 21,413,895,205.56/172,005.40
  6. Step 6: Final answer
    x = 124,495.48

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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.