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Finding the Fourth Proportional to 121,230.60, 181,845.90 and 108,108.60

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Solution

The fourth proportional to 121,230.60, 181,845.90 and 108,108.60 is: 162,162.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,230.60 : 181,845.90 = 108,108.60 : x
  2. Step 2: Convert to fraction form
    121,230.60/181,845.90 = 108,108.60/x
  3. Step 3: Cross multiply
    121,230.60x = 181,845.90 × 108,108.60
  4. Step 4: Simplify right side
    121,230.60x = 19,659,105,664.74
  5. Step 5: Solve for x
    x = 19,659,105,664.74/121,230.60
  6. Step 6: Final answer
    x = 162,162.90

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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.