Home / 128,566.40-192,067.73-83,218.31

Finding the Fourth Proportional to 128,566.40, 192,067.73 and 83,218.31

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Solution

The fourth proportional to 128,566.40, 192,067.73 and 83,218.31 is: 124,321.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,566.40 : 192,067.73 = 83,218.31 : x
  2. Step 2: Convert to fraction form
    128,566.40/192,067.73 = 83,218.31/x
  3. Step 3: Cross multiply
    128,566.40x = 192,067.73 × 83,218.31
  4. Step 4: Simplify right side
    128,566.40x = 15,983,551,480.04
  5. Step 5: Solve for x
    x = 15,983,551,480.04/128,566.40
  6. Step 6: Final answer
    x = 124,321.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.