Home / 128,806.56-177,716.73-83,486.46

Finding the Fourth Proportional to 128,806.56, 177,716.73 and 83,486.46

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Solution

The fourth proportional to 128,806.56, 177,716.73 and 83,486.46 is: 115,187.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,806.56 : 177,716.73 = 83,486.46 : x
  2. Step 2: Convert to fraction form
    128,806.56/177,716.73 = 83,486.46/x
  3. Step 3: Cross multiply
    128,806.56x = 177,716.73 × 83,486.46
  4. Step 4: Simplify right side
    128,806.56x = 14,836,940,670.48
  5. Step 5: Solve for x
    x = 14,836,940,670.48/128,806.56
  6. Step 6: Final answer
    x = 115,187.77

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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.