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Finding the Fourth Proportional to 100,961.58, 151,492.39 and 74,241.71

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Solution

The fourth proportional to 100,961.58, 151,492.39 and 74,241.71 is: 111,399.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,961.58 : 151,492.39 = 74,241.71 : x
  2. Step 2: Convert to fraction form
    100,961.58/151,492.39 = 74,241.71/x
  3. Step 3: Cross multiply
    100,961.58x = 151,492.39 × 74,241.71
  4. Step 4: Simplify right side
    100,961.58x = 11,247,053,142.52
  5. Step 5: Solve for x
    x = 11,247,053,142.52/100,961.58
  6. Step 6: Final answer
    x = 111,399.34

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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.