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Finding the Fourth Proportional to 143,759.63, 198,389.63 and 79,231.17

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Solution

The fourth proportional to 143,759.63, 198,389.63 and 79,231.17 is: 109,339.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,759.63 : 198,389.63 = 79,231.17 : x
  2. Step 2: Convert to fraction form
    143,759.63/198,389.63 = 79,231.17/x
  3. Step 3: Cross multiply
    143,759.63x = 198,389.63 × 79,231.17
  4. Step 4: Simplify right side
    143,759.63x = 15,718,641,657.77
  5. Step 5: Solve for x
    x = 15,718,641,657.77/143,759.63
  6. Step 6: Final answer
    x = 109,339.75

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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.