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Finding the Fourth Proportional to 143,620.92, 198,204.72 and 79,957.32

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Solution

The fourth proportional to 143,620.92, 198,204.72 and 79,957.32 is: 110,345.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,620.92 : 198,204.72 = 79,957.32 : x
  2. Step 2: Convert to fraction form
    143,620.92/198,204.72 = 79,957.32/x
  3. Step 3: Cross multiply
    143,620.92x = 198,204.72 × 79,957.32
  4. Step 4: Simplify right side
    143,620.92x = 15,847,918,222.55
  5. Step 5: Solve for x
    x = 15,847,918,222.55/143,620.92
  6. Step 6: Final answer
    x = 110,345.47

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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.