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Finding the Fourth Proportional to 171,990.69, 257,997.98 and 72,050.46

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Solution

The fourth proportional to 171,990.69, 257,997.98 and 72,050.46 is: 108,080.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,990.69 : 257,997.98 = 72,050.46 : x
  2. Step 2: Convert to fraction form
    171,990.69/257,997.98 = 72,050.46/x
  3. Step 3: Cross multiply
    171,990.69x = 257,997.98 × 72,050.46
  4. Step 4: Simplify right side
    171,990.69x = 18,588,873,138.07
  5. Step 5: Solve for x
    x = 18,588,873,138.07/171,990.69
  6. Step 6: Final answer
    x = 108,080.69

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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.