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Finding the Fourth Proportional to 143,995.68, 215,946.59 and 68,086.71

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Solution

The fourth proportional to 143,995.68, 215,946.59 and 68,086.71 is: 102,107.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,995.68 : 215,946.59 = 68,086.71 : x
  2. Step 2: Convert to fraction form
    143,995.68/215,946.59 = 68,086.71/x
  3. Step 3: Cross multiply
    143,995.68x = 215,946.59 × 68,086.71
  4. Step 4: Simplify right side
    143,995.68x = 14,703,092,508.39
  5. Step 5: Solve for x
    x = 14,703,092,508.39/143,995.68
  6. Step 6: Final answer
    x = 102,107.87

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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.