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Finding the Fourth Proportional to 117,149.20, 161,662.44 and 66,164.02

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Solution

The fourth proportional to 117,149.20, 161,662.44 and 66,164.02 is: 91,304.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,149.20 : 161,662.44 = 66,164.02 : x
  2. Step 2: Convert to fraction form
    117,149.20/161,662.44 = 66,164.02/x
  3. Step 3: Cross multiply
    117,149.20x = 161,662.44 × 66,164.02
  4. Step 4: Simplify right side
    117,149.20x = 10,696,236,913.41
  5. Step 5: Solve for x
    x = 10,696,236,913.41/117,149.20
  6. Step 6: Final answer
    x = 91,304.40

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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.