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Finding the Fourth Proportional to 121,017.54, 166,831.08 and 80,716.59

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Solution

The fourth proportional to 121,017.54, 166,831.08 and 80,716.59 is: 111,273.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,017.54 : 166,831.08 = 80,716.59 : x
  2. Step 2: Convert to fraction form
    121,017.54/166,831.08 = 80,716.59/x
  3. Step 3: Cross multiply
    121,017.54x = 166,831.08 × 80,716.59
  4. Step 4: Simplify right side
    121,017.54x = 13,466,035,883.62
  5. Step 5: Solve for x
    x = 13,466,035,883.62/121,017.54
  6. Step 6: Final answer
    x = 111,273.42

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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.