Home / 42,067.60-58,057.38-31,438.78

Finding the Fourth Proportional to 42,067.60, 58,057.38 and 31,438.78

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Solution

The fourth proportional to 42,067.60, 58,057.38 and 31,438.78 is: 43,388.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,067.60 : 58,057.38 = 31,438.78 : x
  2. Step 2: Convert to fraction form
    42,067.60/58,057.38 = 31,438.78/x
  3. Step 3: Cross multiply
    42,067.60x = 58,057.38 × 31,438.78
  4. Step 4: Simplify right side
    42,067.60x = 1,825,253,197.20
  5. Step 5: Solve for x
    x = 1,825,253,197.20/42,067.60
  6. Step 6: Final answer
    x = 43,388.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.