Home / 120,831.81-166,794.39-80,530.86

Finding the Fourth Proportional to 120,831.81, 166,794.39 and 80,530.86

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Solution

The fourth proportional to 120,831.81, 166,794.39 and 80,530.86 is: 111,163.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,831.81 : 166,794.39 = 80,530.86 : x
  2. Step 2: Convert to fraction form
    120,831.81/166,794.39 = 80,530.86/x
  3. Step 3: Cross multiply
    120,831.81x = 166,794.39 × 80,530.86
  4. Step 4: Simplify right side
    120,831.81x = 13,432,095,669.88
  5. Step 5: Solve for x
    x = 13,432,095,669.88/120,831.81
  6. Step 6: Final answer
    x = 111,163.57

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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.