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Finding the Fourth Proportional to 143,872.44, 215,941.76 and 72,845

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Solution

The fourth proportional to 143,872.44, 215,941.76 and 72,845 is: 109,334.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,872.44 : 215,941.76 = 72,845 : x
  2. Step 2: Convert to fraction form
    143,872.44/215,941.76 = 72,845/x
  3. Step 3: Cross multiply
    143,872.44x = 215,941.76 × 72,845
  4. Step 4: Simplify right side
    143,872.44x = 15,730,277,507.20
  5. Step 5: Solve for x
    x = 15,730,277,507.20/143,872.44
  6. Step 6: Final answer
    x = 109,334.89

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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.