Home / 81,150.68-111,979.73-55,678.97

Finding the Fourth Proportional to 81,150.68, 111,979.73 and 55,678.97

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Solution

The fourth proportional to 81,150.68, 111,979.73 and 55,678.97 is: 76,831.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,150.68 : 111,979.73 = 55,678.97 : x
  2. Step 2: Convert to fraction form
    81,150.68/111,979.73 = 55,678.97/x
  3. Step 3: Cross multiply
    81,150.68x = 111,979.73 × 55,678.97
  4. Step 4: Simplify right side
    81,150.68x = 6,234,915,188.98
  5. Step 5: Solve for x
    x = 6,234,915,188.98/81,150.68
  6. Step 6: Final answer
    x = 76,831.34

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1.5x scale

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.