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Finding the Fourth Proportional to 79,207.98, 109,270.37 and 70,142.58

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Solution

The fourth proportional to 79,207.98, 109,270.37 and 70,142.58 is: 96,764.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,207.98 : 109,270.37 = 70,142.58 : x
  2. Step 2: Convert to fraction form
    79,207.98/109,270.37 = 70,142.58/x
  3. Step 3: Cross multiply
    79,207.98x = 109,270.37 × 70,142.58
  4. Step 4: Simplify right side
    79,207.98x = 7,664,505,581.68
  5. Step 5: Solve for x
    x = 7,664,505,581.68/79,207.98
  6. Step 6: Final answer
    x = 96,764.31

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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.