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Finding the Fourth Proportional to 128,995.62, 193,568.16 and 54,109.08

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Solution

The fourth proportional to 128,995.62, 193,568.16 and 54,109.08 is: 81,194.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,995.62 : 193,568.16 = 54,109.08 : x
  2. Step 2: Convert to fraction form
    128,995.62/193,568.16 = 54,109.08/x
  3. Step 3: Cross multiply
    128,995.62x = 193,568.16 × 54,109.08
  4. Step 4: Simplify right side
    128,995.62x = 10,473,795,054.89
  5. Step 5: Solve for x
    x = 10,473,795,054.89/128,995.62
  6. Step 6: Final answer
    x = 81,194.97

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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.