Home / 81,951.59-122,831.46-31,317.46

Finding the Fourth Proportional to 81,951.59, 122,831.46 and 31,317.46

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Solution

The fourth proportional to 81,951.59, 122,831.46 and 31,317.46 is: 46,939.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,951.59 : 122,831.46 = 31,317.46 : x
  2. Step 2: Convert to fraction form
    81,951.59/122,831.46 = 31,317.46/x
  3. Step 3: Cross multiply
    81,951.59x = 122,831.46 × 31,317.46
  4. Step 4: Simplify right side
    81,951.59x = 3,846,768,721.13
  5. Step 5: Solve for x
    x = 3,846,768,721.13/81,951.59
  6. Step 6: Final answer
    x = 46,939.53

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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.