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Finding the Fourth Proportional to 121,881.80, 182,822.70 and 108,662.60

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Solution

The fourth proportional to 121,881.80, 182,822.70 and 108,662.60 is: 162,993.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,881.80 : 182,822.70 = 108,662.60 : x
  2. Step 2: Convert to fraction form
    121,881.80/182,822.70 = 108,662.60/x
  3. Step 3: Cross multiply
    121,881.80x = 182,822.70 × 108,662.60
  4. Step 4: Simplify right side
    121,881.80x = 19,865,989,921.02
  5. Step 5: Solve for x
    x = 19,865,989,921.02/121,881.80
  6. Step 6: Final answer
    x = 162,993.90

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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.