Home / 205,824.36-308,727.26-85,831.90

Finding the Fourth Proportional to 205,824.36, 308,727.26 and 85,831.90

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Solution

The fourth proportional to 205,824.36, 308,727.26 and 85,831.90 is: 128,743.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,824.36 : 308,727.26 = 85,831.90 : x
  2. Step 2: Convert to fraction form
    205,824.36/308,727.26 = 85,831.90/x
  3. Step 3: Cross multiply
    205,824.36x = 308,727.26 × 85,831.90
  4. Step 4: Simplify right side
    205,824.36x = 26,498,647,307.59
  5. Step 5: Solve for x
    x = 26,498,647,307.59/205,824.36
  6. Step 6: Final answer
    x = 128,743.98

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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.