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Finding the Fourth Proportional to 138,433.40, 207,650.10 and 68,449.40

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Solution

The fourth proportional to 138,433.40, 207,650.10 and 68,449.40 is: 102,674.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,433.40 : 207,650.10 = 68,449.40 : x
  2. Step 2: Convert to fraction form
    138,433.40/207,650.10 = 68,449.40/x
  3. Step 3: Cross multiply
    138,433.40x = 207,650.10 × 68,449.40
  4. Step 4: Simplify right side
    138,433.40x = 14,213,524,754.94
  5. Step 5: Solve for x
    x = 14,213,524,754.94/138,433.40
  6. Step 6: Final answer
    x = 102,674.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.