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Finding the Fourth Proportional to 171,990.56, 257,722.80 and 72,096.28

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Solution

The fourth proportional to 171,990.56, 257,722.80 and 72,096.28 is: 108,034.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,990.56 : 257,722.80 = 72,096.28 : x
  2. Step 2: Convert to fraction form
    171,990.56/257,722.80 = 72,096.28/x
  3. Step 3: Cross multiply
    171,990.56x = 257,722.80 × 72,096.28
  4. Step 4: Simplify right side
    171,990.56x = 18,580,855,151.18
  5. Step 5: Solve for x
    x = 18,580,855,151.18/171,990.56
  6. Step 6: Final answer
    x = 108,034.16

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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.