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Finding the Fourth Proportional to 142,996.54, 197,358.84 and 79,354.84

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Solution

The fourth proportional to 142,996.54, 197,358.84 and 79,354.84 is: 109,522.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,996.54 : 197,358.84 = 79,354.84 : x
  2. Step 2: Convert to fraction form
    142,996.54/197,358.84 = 79,354.84/x
  3. Step 3: Cross multiply
    142,996.54x = 197,358.84 × 79,354.84
  4. Step 4: Simplify right side
    142,996.54x = 15,661,379,170.79
  5. Step 5: Solve for x
    x = 15,661,379,170.79/142,996.54
  6. Step 6: Final answer
    x = 109,522.78

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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.