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Finding the Fourth Proportional to 143,453.70, 215,205.12 and 43,623.81

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Solution

The fourth proportional to 143,453.70, 215,205.12 and 43,623.81 is: 65,443.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,453.70 : 215,205.12 = 43,623.81 : x
  2. Step 2: Convert to fraction form
    143,453.70/215,205.12 = 43,623.81/x
  3. Step 3: Cross multiply
    143,453.70x = 215,205.12 × 43,623.81
  4. Step 4: Simplify right side
    143,453.70x = 9,388,067,265.91
  5. Step 5: Solve for x
    x = 9,388,067,265.91/143,453.70
  6. Step 6: Final answer
    x = 65,443.19

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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.