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Finding the Fourth Proportional to 128,697.84, 192,976.59 and 38,727.39

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Solution

The fourth proportional to 128,697.84, 192,976.59 and 38,727.39 is: 58,069.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,697.84 : 192,976.59 = 38,727.39 : x
  2. Step 2: Convert to fraction form
    128,697.84/192,976.59 = 38,727.39/x
  3. Step 3: Cross multiply
    128,697.84x = 192,976.59 × 38,727.39
  4. Step 4: Simplify right side
    128,697.84x = 7,473,479,661.80
  5. Step 5: Solve for x
    x = 7,473,479,661.80/128,697.84
  6. Step 6: Final answer
    x = 58,069.97

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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.