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Finding the Fourth Proportional to 230,398.36, 317,911.26 and 128,401.56

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Solution

The fourth proportional to 230,398.36, 317,911.26 and 128,401.56 is: 177,172.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,398.36 : 317,911.26 = 128,401.56 : x
  2. Step 2: Convert to fraction form
    230,398.36/317,911.26 = 128,401.56/x
  3. Step 3: Cross multiply
    230,398.36x = 317,911.26 × 128,401.56
  4. Step 4: Simplify right side
    230,398.36x = 40,820,301,725.57
  5. Step 5: Solve for x
    x = 40,820,301,725.57/230,398.36
  6. Step 6: Final answer
    x = 177,172.71

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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.