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Finding the Fourth Proportional to 193,611.78, 267,068.40 and 121,867.20

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Solution

The fourth proportional to 193,611.78, 267,068.40 and 121,867.20 is: 168,103.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,611.78 : 267,068.40 = 121,867.20 : x
  2. Step 2: Convert to fraction form
    193,611.78/267,068.40 = 121,867.20/x
  3. Step 3: Cross multiply
    193,611.78x = 267,068.40 × 121,867.20
  4. Step 4: Simplify right side
    193,611.78x = 32,546,878,116.48
  5. Step 5: Solve for x
    x = 32,546,878,116.48/193,611.78
  6. Step 6: Final answer
    x = 168,103.81

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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.