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Finding the Fourth Proportional to 115,067.28, 172,610.28 and 31,961.28

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Solution

The fourth proportional to 115,067.28, 172,610.28 and 31,961.28 is: 47,944.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,067.28 : 172,610.28 = 31,961.28 : x
  2. Step 2: Convert to fraction form
    115,067.28/172,610.28 = 31,961.28/x
  3. Step 3: Cross multiply
    115,067.28x = 172,610.28 × 31,961.28
  4. Step 4: Simplify right side
    115,067.28x = 5,516,845,489.96
  5. Step 5: Solve for x
    x = 5,516,845,489.96/115,067.28
  6. Step 6: Final answer
    x = 47,944.52

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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.