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Finding the Fourth Proportional to 121,409.20, 181,822.20 and 116,160.40

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Solution

The fourth proportional to 121,409.20, 181,822.20 and 116,160.40 is: 173,961.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,409.20 : 181,822.20 = 116,160.40 : x
  2. Step 2: Convert to fraction form
    121,409.20/181,822.20 = 116,160.40/x
  3. Step 3: Cross multiply
    121,409.20x = 181,822.20 × 116,160.40
  4. Step 4: Simplify right side
    121,409.20x = 21,120,539,480.88
  5. Step 5: Solve for x
    x = 21,120,539,480.88/121,409.20
  6. Step 6: Final answer
    x = 173,961.61

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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.