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Finding the Fourth Proportional to 171,398.80, 257,098.20 and 71,525.80

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Solution

The fourth proportional to 171,398.80, 257,098.20 and 71,525.80 is: 107,288.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,398.80 : 257,098.20 = 71,525.80 : x
  2. Step 2: Convert to fraction form
    171,398.80/257,098.20 = 71,525.80/x
  3. Step 3: Cross multiply
    171,398.80x = 257,098.20 × 71,525.80
  4. Step 4: Simplify right side
    171,398.80x = 18,389,154,433.56
  5. Step 5: Solve for x
    x = 18,389,154,433.56/171,398.80
  6. Step 6: Final answer
    x = 107,288.70

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1.5x scale

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.