Home / 78,831.52-108,786.71-43,021.21

Finding the Fourth Proportional to 78,831.52, 108,786.71 and 43,021.21

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Solution

The fourth proportional to 78,831.52, 108,786.71 and 43,021.21 is: 59,368.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,831.52 : 108,786.71 = 43,021.21 : x
  2. Step 2: Convert to fraction form
    78,831.52/108,786.71 = 43,021.21/x
  3. Step 3: Cross multiply
    78,831.52x = 108,786.71 × 43,021.21
  4. Step 4: Simplify right side
    78,831.52x = 4,680,135,896.12
  5. Step 5: Solve for x
    x = 4,680,135,896.12/78,831.52
  6. Step 6: Final answer
    x = 59,368.84

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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.