Home / 128,781.33-177,688.38-111,755.52

Finding the Fourth Proportional to 128,781.33, 177,688.38 and 111,755.52

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Solution

The fourth proportional to 128,781.33, 177,688.38 and 111,755.52 is: 154,196.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,781.33 : 177,688.38 = 111,755.52 : x
  2. Step 2: Convert to fraction form
    128,781.33/177,688.38 = 111,755.52/x
  3. Step 3: Cross multiply
    128,781.33x = 177,688.38 × 111,755.52
  4. Step 4: Simplify right side
    128,781.33x = 19,857,657,304.86
  5. Step 5: Solve for x
    x = 19,857,657,304.86/128,781.33
  6. Step 6: Final answer
    x = 154,196.71

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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.