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Finding the Fourth Proportional to 143,523.72, 215,145.90 and 68,624.46

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Solution

The fourth proportional to 143,523.72, 215,145.90 and 68,624.46 is: 102,869.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,523.72 : 215,145.90 = 68,624.46 : x
  2. Step 2: Convert to fraction form
    143,523.72/215,145.90 = 68,624.46/x
  3. Step 3: Cross multiply
    143,523.72x = 215,145.90 × 68,624.46
  4. Step 4: Simplify right side
    143,523.72x = 14,764,271,208.71
  5. Step 5: Solve for x
    x = 14,764,271,208.71/143,523.72
  6. Step 6: Final answer
    x = 102,869.90

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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.