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Finding the Fourth Proportional to 143,798.87, 198,433.71 and 79,265.28

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Solution

The fourth proportional to 143,798.87, 198,433.71 and 79,265.28 is: 109,381.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,798.87 : 198,433.71 = 79,265.28 : x
  2. Step 2: Convert to fraction form
    143,798.87/198,433.71 = 79,265.28/x
  3. Step 3: Cross multiply
    143,798.87x = 198,433.71 × 79,265.28
  4. Step 4: Simplify right side
    143,798.87x = 15,728,903,584.59
  5. Step 5: Solve for x
    x = 15,728,903,584.59/143,798.87
  6. Step 6: Final answer
    x = 109,381.27

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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.