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Finding the Fourth Proportional to 171,145.81, 256,844.84 and 81,188.80

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Solution

The fourth proportional to 171,145.81, 256,844.84 and 81,188.80 is: 121,843.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,145.81 : 256,844.84 = 81,188.80 : x
  2. Step 2: Convert to fraction form
    171,145.81/256,844.84 = 81,188.80/x
  3. Step 3: Cross multiply
    171,145.81x = 256,844.84 × 81,188.80
  4. Step 4: Simplify right side
    171,145.81x = 20,852,924,345.79
  5. Step 5: Solve for x
    x = 20,852,924,345.79/171,145.81
  6. Step 6: Final answer
    x = 121,843.04

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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.