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Finding the Fourth Proportional to 143,494.74, 215,241.75 and 68,387.22

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Solution

The fourth proportional to 143,494.74, 215,241.75 and 68,387.22 is: 102,580.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,494.74 : 215,241.75 = 68,387.22 : x
  2. Step 2: Convert to fraction form
    143,494.74/215,241.75 = 68,387.22/x
  3. Step 3: Cross multiply
    143,494.74x = 215,241.75 × 68,387.22
  4. Step 4: Simplify right side
    143,494.74x = 14,719,784,910.44
  5. Step 5: Solve for x
    x = 14,719,784,910.44/143,494.74
  6. Step 6: Final answer
    x = 102,580.66

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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.