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Finding the Fourth Proportional to 230,375.43, 317,919.65 and 128,407.44

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Solution

The fourth proportional to 230,375.43, 317,919.65 and 128,407.44 is: 177,203.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,375.43 : 317,919.65 = 128,407.44 : x
  2. Step 2: Convert to fraction form
    230,375.43/317,919.65 = 128,407.44/x
  3. Step 3: Cross multiply
    230,375.43x = 317,919.65 × 128,407.44
  4. Step 4: Simplify right side
    230,375.43x = 40,823,247,740.16
  5. Step 5: Solve for x
    x = 40,823,247,740.16/230,375.43
  6. Step 6: Final answer
    x = 177,203.13

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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.