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Finding the Fourth Proportional to 230,732.78, 318,410.63 and 128,757.15

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Solution

The fourth proportional to 230,732.78, 318,410.63 and 128,757.15 is: 177,684.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,732.78 : 318,410.63 = 128,757.15 : x
  2. Step 2: Convert to fraction form
    230,732.78/318,410.63 = 128,757.15/x
  3. Step 3: Cross multiply
    230,732.78x = 318,410.63 × 128,757.15
  4. Step 4: Simplify right side
    230,732.78x = 40,997,644,604.72
  5. Step 5: Solve for x
    x = 40,997,644,604.72/230,732.78
  6. Step 6: Final answer
    x = 177,684.53

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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.