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Finding the Fourth Proportional to 171,425.80, 257,138.70 and 71,552.80

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Solution

The fourth proportional to 171,425.80, 257,138.70 and 71,552.80 is: 107,329.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,425.80 : 257,138.70 = 71,552.80 : x
  2. Step 2: Convert to fraction form
    171,425.80/257,138.70 = 71,552.80/x
  3. Step 3: Cross multiply
    171,425.80x = 257,138.70 × 71,552.80
  4. Step 4: Simplify right side
    171,425.80x = 18,398,993,973.36
  5. Step 5: Solve for x
    x = 18,398,993,973.36/171,425.80
  6. Step 6: Final answer
    x = 107,329.20

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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.