Home / 136,789.38-188,778.84-76,371.90

Finding the Fourth Proportional to 136,789.38, 188,778.84 and 76,371.90

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Solution

The fourth proportional to 136,789.38, 188,778.84 and 76,371.90 is: 105,398.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,789.38 : 188,778.84 = 76,371.90 : x
  2. Step 2: Convert to fraction form
    136,789.38/188,778.84 = 76,371.90/x
  3. Step 3: Cross multiply
    136,789.38x = 188,778.84 × 76,371.90
  4. Step 4: Simplify right side
    136,789.38x = 14,417,398,690.60
  5. Step 5: Solve for x
    x = 14,417,398,690.60/136,789.38
  6. Step 6: Final answer
    x = 105,398.52

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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.