Home / 128,277.16-192,205.39-90,653.47

Finding the Fourth Proportional to 128,277.16, 192,205.39 and 90,653.47

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Solution

The fourth proportional to 128,277.16, 192,205.39 and 90,653.47 is: 135,831.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,277.16 : 192,205.39 = 90,653.47 : x
  2. Step 2: Convert to fraction form
    128,277.16/192,205.39 = 90,653.47/x
  3. Step 3: Cross multiply
    128,277.16x = 192,205.39 × 90,653.47
  4. Step 4: Simplify right side
    128,277.16x = 17,424,085,556.20
  5. Step 5: Solve for x
    x = 17,424,085,556.20/128,277.16
  6. Step 6: Final answer
    x = 135,831.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.