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Finding the Fourth Proportional to 230,891.80, 318,627.66 and 128,919

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Solution

The fourth proportional to 230,891.80, 318,627.66 and 128,919 is: 177,906.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,891.80 : 318,627.66 = 128,919 : x
  2. Step 2: Convert to fraction form
    230,891.80/318,627.66 = 128,919/x
  3. Step 3: Cross multiply
    230,891.80x = 318,627.66 × 128,919
  4. Step 4: Simplify right side
    230,891.80x = 41,077,159,299.54
  5. Step 5: Solve for x
    x = 41,077,159,299.54/230,891.80
  6. Step 6: Final answer
    x = 177,906.53

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1.5x scale

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.