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Finding the Fourth Proportional to 171,989.69, 257,996.48 and 72,049.46

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Solution

The fourth proportional to 171,989.69, 257,996.48 and 72,049.46 is: 108,079.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,989.69 : 257,996.48 = 72,049.46 : x
  2. Step 2: Convert to fraction form
    171,989.69/257,996.48 = 72,049.46/x
  3. Step 3: Cross multiply
    171,989.69x = 257,996.48 × 72,049.46
  4. Step 4: Simplify right side
    171,989.69x = 18,588,505,415.67
  5. Step 5: Solve for x
    x = 18,588,505,415.67/171,989.69
  6. Step 6: Final answer
    x = 108,079.19

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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.