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Finding the Fourth Proportional to 131,169.66, 196,669.71 and 71,989.44

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Solution

The fourth proportional to 131,169.66, 196,669.71 and 71,989.44 is: 107,937.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,169.66 : 196,669.71 = 71,989.44 : x
  2. Step 2: Convert to fraction form
    131,169.66/196,669.71 = 71,989.44/x
  3. Step 3: Cross multiply
    131,169.66x = 196,669.71 × 71,989.44
  4. Step 4: Simplify right side
    131,169.66x = 14,158,142,287.86
  5. Step 5: Solve for x
    x = 14,158,142,287.86/131,169.66
  6. Step 6: Final answer
    x = 107,937.63

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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.