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Finding the Fourth Proportional to 30,768.30, 43,163.10 and 30,768.30

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Solution

The fourth proportional to 30,768.30, 43,163.10 and 30,768.30 is: 43,163.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,768.30 : 43,163.10 = 30,768.30 : x
  2. Step 2: Convert to fraction form
    30,768.30/43,163.10 = 30,768.30/x
  3. Step 3: Cross multiply
    30,768.30x = 43,163.10 × 30,768.30
  4. Step 4: Simplify right side
    30,768.30x = 1,328,055,209.73
  5. Step 5: Solve for x
    x = 1,328,055,209.73/30,768.30
  6. Step 6: Final answer
    x = 43,163.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.