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Finding the Fourth Proportional to 142,753.92, 196,992.18 and 79,087.92

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Solution

The fourth proportional to 142,753.92, 196,992.18 and 79,087.92 is: 109,136.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,753.92 : 196,992.18 = 79,087.92 : x
  2. Step 2: Convert to fraction form
    142,753.92/196,992.18 = 79,087.92/x
  3. Step 3: Cross multiply
    142,753.92x = 196,992.18 × 79,087.92
  4. Step 4: Simplify right side
    142,753.92x = 15,579,701,772.47
  5. Step 5: Solve for x
    x = 15,579,701,772.47/142,753.92
  6. Step 6: Final answer
    x = 109,136.77

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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.