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Finding the Fourth Proportional to 143,626.87, 215,329.29 and 72,512.90

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Solution

The fourth proportional to 143,626.87, 215,329.29 and 72,512.90 is: 108,713.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,626.87 : 215,329.29 = 72,512.90 : x
  2. Step 2: Convert to fraction form
    143,626.87/215,329.29 = 72,512.90/x
  3. Step 3: Cross multiply
    143,626.87x = 215,329.29 × 72,512.90
  4. Step 4: Simplify right side
    143,626.87x = 15,614,151,272.84
  5. Step 5: Solve for x
    x = 15,614,151,272.84/143,626.87
  6. Step 6: Final answer
    x = 108,713.30

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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.