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Finding the Fourth Proportional to 143,844.48, 198,491.04 and 87,252.48

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Solution

The fourth proportional to 143,844.48, 198,491.04 and 87,252.48 is: 120,399.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,844.48 : 198,491.04 = 87,252.48 : x
  2. Step 2: Convert to fraction form
    143,844.48/198,491.04 = 87,252.48/x
  3. Step 3: Cross multiply
    143,844.48x = 198,491.04 × 87,252.48
  4. Step 4: Simplify right side
    143,844.48x = 17,318,835,497.78
  5. Step 5: Solve for x
    x = 17,318,835,497.78/143,844.48
  6. Step 6: Final answer
    x = 120,399.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.