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Finding the Fourth Proportional to 143,720.75, 215,487.23 and 68,838.48

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Solution

The fourth proportional to 143,720.75, 215,487.23 and 68,838.48 is: 103,212.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,720.75 : 215,487.23 = 68,838.48 : x
  2. Step 2: Convert to fraction form
    143,720.75/215,487.23 = 68,838.48/x
  3. Step 3: Cross multiply
    143,720.75x = 215,487.23 × 68,838.48
  4. Step 4: Simplify right side
    143,720.75x = 14,833,813,028.42
  5. Step 5: Solve for x
    x = 14,833,813,028.42/143,720.75
  6. Step 6: Final answer
    x = 103,212.75

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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.