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Finding the Fourth Proportional to 128,990.44, 193,448.94 and 50,087.80

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Solution

The fourth proportional to 128,990.44, 193,448.94 and 50,087.80 is: 75,117.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,990.44 : 193,448.94 = 50,087.80 : x
  2. Step 2: Convert to fraction form
    128,990.44/193,448.94 = 50,087.80/x
  3. Step 3: Cross multiply
    128,990.44x = 193,448.94 × 50,087.80
  4. Step 4: Simplify right side
    128,990.44x = 9,689,431,816.93
  5. Step 5: Solve for x
    x = 9,689,431,816.93/128,990.44
  6. Step 6: Final answer
    x = 75,117.44

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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.