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Finding the Fourth Proportional to 171,861.23, 257,486.83 and 71,801.21

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Solution

The fourth proportional to 171,861.23, 257,486.83 and 71,801.21 is: 107,574.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,861.23 : 257,486.83 = 71,801.21 : x
  2. Step 2: Convert to fraction form
    171,861.23/257,486.83 = 71,801.21/x
  3. Step 3: Cross multiply
    171,861.23x = 257,486.83 × 71,801.21
  4. Step 4: Simplify right side
    171,861.23x = 18,487,865,953.06
  5. Step 5: Solve for x
    x = 18,487,865,953.06/171,861.23
  6. Step 6: Final answer
    x = 107,574.38

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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.