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Finding the Fourth Proportional to 121,019.31, 166,831.57 and 80,114.89

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Solution

The fourth proportional to 121,019.31, 166,831.57 and 80,114.89 is: 110,442.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,019.31 : 166,831.57 = 80,114.89 : x
  2. Step 2: Convert to fraction form
    121,019.31/166,831.57 = 80,114.89/x
  3. Step 3: Cross multiply
    121,019.31x = 166,831.57 × 80,114.89
  4. Step 4: Simplify right side
    121,019.31x = 13,365,692,879.08
  5. Step 5: Solve for x
    x = 13,365,692,879.08/121,019.31
  6. Step 6: Final answer
    x = 110,442.65

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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.