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Finding the Fourth Proportional to 79,396.57, 119,004.26 and 31,981.30

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Solution

The fourth proportional to 79,396.57, 119,004.26 and 31,981.30 is: 47,935.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,396.57 : 119,004.26 = 31,981.30 : x
  2. Step 2: Convert to fraction form
    79,396.57/119,004.26 = 31,981.30/x
  3. Step 3: Cross multiply
    79,396.57x = 119,004.26 × 31,981.30
  4. Step 4: Simplify right side
    79,396.57x = 3,805,910,185.41
  5. Step 5: Solve for x
    x = 3,805,910,185.41/79,396.57
  6. Step 6: Final answer
    x = 47,935.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.