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Finding the Fourth Proportional to 68,007.68, 102,031.36 and 28,544

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Solution

The fourth proportional to 68,007.68, 102,031.36 and 28,544 is: 42,824.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,007.68 : 102,031.36 = 28,544 : x
  2. Step 2: Convert to fraction form
    68,007.68/102,031.36 = 28,544/x
  3. Step 3: Cross multiply
    68,007.68x = 102,031.36 × 28,544
  4. Step 4: Simplify right side
    68,007.68x = 2,912,383,139.84
  5. Step 5: Solve for x
    x = 2,912,383,139.84/68,007.68
  6. Step 6: Final answer
    x = 42,824.33

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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.