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Finding the Fourth Proportional to 171,397.90, 257,054.90 and 71,558.92

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Solution

The fourth proportional to 171,397.90, 257,054.90 and 71,558.92 is: 107,320.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,397.90 : 257,054.90 = 71,558.92 : x
  2. Step 2: Convert to fraction form
    171,397.90/257,054.90 = 71,558.92/x
  3. Step 3: Cross multiply
    171,397.90x = 257,054.90 × 71,558.92
  4. Step 4: Simplify right side
    171,397.90x = 18,394,571,024.71
  5. Step 5: Solve for x
    x = 18,394,571,024.71/171,397.90
  6. Step 6: Final answer
    x = 107,320.87

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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.