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Finding the Fourth Proportional to 171,565.70, 257,449.65 and 71,718.20

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Solution

The fourth proportional to 171,565.70, 257,449.65 and 71,718.20 is: 107,619.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,565.70 : 257,449.65 = 71,718.20 : x
  2. Step 2: Convert to fraction form
    171,565.70/257,449.65 = 71,718.20/x
  3. Step 3: Cross multiply
    171,565.70x = 257,449.65 × 71,718.20
  4. Step 4: Simplify right side
    171,565.70x = 18,463,825,488.63
  5. Step 5: Solve for x
    x = 18,463,825,488.63/171,565.70
  6. Step 6: Final answer
    x = 107,619.56

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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.