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Finding the Fourth Proportional to 230,446.07, 318,016.89 and 128,478

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Solution

The fourth proportional to 230,446.07, 318,016.89 and 128,478 is: 177,300.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,446.07 : 318,016.89 = 128,478 : x
  2. Step 2: Convert to fraction form
    230,446.07/318,016.89 = 128,478/x
  3. Step 3: Cross multiply
    230,446.07x = 318,016.89 × 128,478
  4. Step 4: Simplify right side
    230,446.07x = 40,858,173,993.42
  5. Step 5: Solve for x
    x = 40,858,173,993.42/230,446.07
  6. Step 6: Final answer
    x = 177,300.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.