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Finding the Fourth Proportional to 143,345, 197,806.74 and 79,680.44

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Solution

The fourth proportional to 143,345, 197,806.74 and 79,680.44 is: 109,953.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,345 : 197,806.74 = 79,680.44 : x
  2. Step 2: Convert to fraction form
    143,345/197,806.74 = 79,680.44/x
  3. Step 3: Cross multiply
    143,345x = 197,806.74 × 79,680.44
  4. Step 4: Simplify right side
    143,345x = 15,761,328,078.17
  5. Step 5: Solve for x
    x = 15,761,328,078.17/143,345
  6. Step 6: Final answer
    x = 109,953.80

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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.