Home / 128,736.54-177,623.07-77,708.94

Finding the Fourth Proportional to 128,736.54, 177,623.07 and 77,708.94

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Solution

The fourth proportional to 128,736.54, 177,623.07 and 77,708.94 is: 107,218.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,736.54 : 177,623.07 = 77,708.94 : x
  2. Step 2: Convert to fraction form
    128,736.54/177,623.07 = 77,708.94/x
  3. Step 3: Cross multiply
    128,736.54x = 177,623.07 × 77,708.94
  4. Step 4: Simplify right side
    128,736.54x = 13,802,900,489.25
  5. Step 5: Solve for x
    x = 13,802,900,489.25/128,736.54
  6. Step 6: Final answer
    x = 107,218.20

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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.