Home / 128,828.43-177,785.07-77,834.07

Finding the Fourth Proportional to 128,828.43, 177,785.07 and 77,834.07

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Solution

The fourth proportional to 128,828.43, 177,785.07 and 77,834.07 is: 107,412.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,828.43 : 177,785.07 = 77,834.07 : x
  2. Step 2: Convert to fraction form
    128,828.43/177,785.07 = 77,834.07/x
  3. Step 3: Cross multiply
    128,828.43x = 177,785.07 × 77,834.07
  4. Step 4: Simplify right side
    128,828.43x = 13,837,735,583.33
  5. Step 5: Solve for x
    x = 13,837,735,583.33/128,828.43
  6. Step 6: Final answer
    x = 107,412.13

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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.