Home / 142,805.97-197,067.93-78,273.81

Finding the Fourth Proportional to 142,805.97, 197,067.93 and 78,273.81

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Solution

The fourth proportional to 142,805.97, 197,067.93 and 78,273.81 is: 108,015.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,805.97 : 197,067.93 = 78,273.81 : x
  2. Step 2: Convert to fraction form
    142,805.97/197,067.93 = 78,273.81/x
  3. Step 3: Cross multiply
    142,805.97x = 197,067.93 × 78,273.81
  4. Step 4: Simplify right side
    142,805.97x = 15,425,257,709.91
  5. Step 5: Solve for x
    x = 15,425,257,709.91/142,805.97
  6. Step 6: Final answer
    x = 108,015.50

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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.