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Finding the Fourth Proportional to 128,276, 192,416.88 and 44,036

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Solution

The fourth proportional to 128,276, 192,416.88 and 44,036 is: 66,054.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,276 : 192,416.88 = 44,036 : x
  2. Step 2: Convert to fraction form
    128,276/192,416.88 = 44,036/x
  3. Step 3: Cross multiply
    128,276x = 192,416.88 × 44,036
  4. Step 4: Simplify right side
    128,276x = 8,473,269,727.68
  5. Step 5: Solve for x
    x = 8,473,269,727.68/128,276
  6. Step 6: Final answer
    x = 66,054.99

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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.