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Finding the Fourth Proportional to 142,761.92, 197,003.20 and 79,095.92

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Solution

The fourth proportional to 142,761.92, 197,003.20 and 79,095.92 is: 109,147.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,761.92 : 197,003.20 = 79,095.92 : x
  2. Step 2: Convert to fraction form
    142,761.92/197,003.20 = 79,095.92/x
  3. Step 3: Cross multiply
    142,761.92x = 197,003.20 × 79,095.92
  4. Step 4: Simplify right side
    142,761.92x = 15,582,149,346.94
  5. Step 5: Solve for x
    x = 15,582,149,346.94/142,761.92
  6. Step 6: Final answer
    x = 109,147.80

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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.