Home / 165,231.78-228,021.93-89,781.54

Finding the Fourth Proportional to 165,231.78, 228,021.93 and 89,781.54

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Solution

The fourth proportional to 165,231.78, 228,021.93 and 89,781.54 is: 123,899.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,231.78 : 228,021.93 = 89,781.54 : x
  2. Step 2: Convert to fraction form
    165,231.78/228,021.93 = 89,781.54/x
  3. Step 3: Cross multiply
    165,231.78x = 228,021.93 × 89,781.54
  4. Step 4: Simplify right side
    165,231.78x = 20,472,160,029.17
  5. Step 5: Solve for x
    x = 20,472,160,029.17/165,231.78
  6. Step 6: Final answer
    x = 123,899.65

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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.