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Finding the Fourth Proportional to 172,997.60, 259,690.80 and 133,728.80

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Solution

The fourth proportional to 172,997.60, 259,690.80 and 133,728.80 is: 200,743.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,997.60 : 259,690.80 = 133,728.80 : x
  2. Step 2: Convert to fraction form
    172,997.60/259,690.80 = 133,728.80/x
  3. Step 3: Cross multiply
    172,997.60x = 259,690.80 × 133,728.80
  4. Step 4: Simplify right side
    172,997.60x = 34,728,139,055.04
  5. Step 5: Solve for x
    x = 34,728,139,055.04/172,997.60
  6. Step 6: Final answer
    x = 200,743.47

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1.5x scale

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.