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Finding the Fourth Proportional to 235,761.78, 325,358.60 and 128,338.97

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Solution

The fourth proportional to 235,761.78, 325,358.60 and 128,338.97 is: 177,111.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,761.78 : 325,358.60 = 128,338.97 : x
  2. Step 2: Convert to fraction form
    235,761.78/325,358.60 = 128,338.97/x
  3. Step 3: Cross multiply
    235,761.78x = 325,358.60 × 128,338.97
  4. Step 4: Simplify right side
    235,761.78x = 41,756,187,776.34
  5. Step 5: Solve for x
    x = 41,756,187,776.34/235,761.78
  6. Step 6: Final answer
    x = 177,111.78

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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.