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Finding the Fourth Proportional to 143,287.76, 197,731.14 and 79,625

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Solution

The fourth proportional to 143,287.76, 197,731.14 and 79,625 is: 109,879.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,287.76 : 197,731.14 = 79,625 : x
  2. Step 2: Convert to fraction form
    143,287.76/197,731.14 = 79,625/x
  3. Step 3: Cross multiply
    143,287.76x = 197,731.14 × 79,625
  4. Step 4: Simplify right side
    143,287.76x = 15,744,342,022.50
  5. Step 5: Solve for x
    x = 15,744,342,022.50/143,287.76
  6. Step 6: Final answer
    x = 109,879.18

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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.