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Finding the Fourth Proportional to 171,661.55, 256,718.81 and 131,147.42

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Solution

The fourth proportional to 171,661.55, 256,718.81 and 131,147.42 is: 196,130.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,661.55 : 256,718.81 = 131,147.42 : x
  2. Step 2: Convert to fraction form
    171,661.55/256,718.81 = 131,147.42/x
  3. Step 3: Cross multiply
    171,661.55x = 256,718.81 × 131,147.42
  4. Step 4: Simplify right side
    171,661.55x = 33,668,008,641.24
  5. Step 5: Solve for x
    x = 33,668,008,641.24/171,661.55
  6. Step 6: Final answer
    x = 196,130.17

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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.