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Finding the Fourth Proportional to 142,791.92, 197,053.80 and 79,133.84

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Solution

The fourth proportional to 142,791.92, 197,053.80 and 79,133.84 is: 109,205.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,791.92 : 197,053.80 = 79,133.84 : x
  2. Step 2: Convert to fraction form
    142,791.92/197,053.80 = 79,133.84/x
  3. Step 3: Cross multiply
    142,791.92x = 197,053.80 × 79,133.84
  4. Step 4: Simplify right side
    142,791.92x = 15,593,623,880.59
  5. Step 5: Solve for x
    x = 15,593,623,880.59/142,791.92
  6. Step 6: Final answer
    x = 109,205.23

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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.