Home / 128,910.31-177,917.63-75,195.36

Finding the Fourth Proportional to 128,910.31, 177,917.63 and 75,195.36

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Solution

The fourth proportional to 128,910.31, 177,917.63 and 75,195.36 is: 103,782.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,910.31 : 177,917.63 = 75,195.36 : x
  2. Step 2: Convert to fraction form
    128,910.31/177,917.63 = 75,195.36/x
  3. Step 3: Cross multiply
    128,910.31x = 177,917.63 × 75,195.36
  4. Step 4: Simplify right side
    128,910.31x = 13,378,579,862.22
  5. Step 5: Solve for x
    x = 13,378,579,862.22/128,910.31
  6. Step 6: Final answer
    x = 103,782.08

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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.