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Finding the Fourth Proportional to 143,889.06, 215,895.90 and 77,251.44

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Solution

The fourth proportional to 143,889.06, 215,895.90 and 77,251.44 is: 115,910.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,889.06 : 215,895.90 = 77,251.44 : x
  2. Step 2: Convert to fraction form
    143,889.06/215,895.90 = 77,251.44/x
  3. Step 3: Cross multiply
    143,889.06x = 215,895.90 × 77,251.44
  4. Step 4: Simplify right side
    143,889.06x = 16,678,269,165.10
  5. Step 5: Solve for x
    x = 16,678,269,165.10/143,889.06
  6. Step 6: Final answer
    x = 115,910.61

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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.