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Finding the Fourth Proportional to 143,864.66, 215,601.70 and 76,379.64

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Solution

The fourth proportional to 143,864.66, 215,601.70 and 76,379.64 is: 114,465.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,864.66 : 215,601.70 = 76,379.64 : x
  2. Step 2: Convert to fraction form
    143,864.66/215,601.70 = 76,379.64/x
  3. Step 3: Cross multiply
    143,864.66x = 215,601.70 × 76,379.64
  4. Step 4: Simplify right side
    143,864.66x = 16,467,580,229.39
  5. Step 5: Solve for x
    x = 16,467,580,229.39/143,864.66
  6. Step 6: Final answer
    x = 114,465.78

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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.