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Finding the Fourth Proportional to 171,566.70, 257,451.15 and 71,719.20

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Solution

The fourth proportional to 171,566.70, 257,451.15 and 71,719.20 is: 107,621.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,566.70 : 257,451.15 = 71,719.20 : x
  2. Step 2: Convert to fraction form
    171,566.70/257,451.15 = 71,719.20/x
  3. Step 3: Cross multiply
    171,566.70x = 257,451.15 × 71,719.20
  4. Step 4: Simplify right side
    171,566.70x = 18,464,190,517.08
  5. Step 5: Solve for x
    x = 18,464,190,517.08/171,566.70
  6. Step 6: Final answer
    x = 107,621.06

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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.