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Finding the Fourth Proportional to 68,112.84, 102,065.02 and 28,648.36

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Solution

The fourth proportional to 68,112.84, 102,065.02 and 28,648.36 is: 42,928.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,112.84 : 102,065.02 = 28,648.36 : x
  2. Step 2: Convert to fraction form
    68,112.84/102,065.02 = 28,648.36/x
  3. Step 3: Cross multiply
    68,112.84x = 102,065.02 × 28,648.36
  4. Step 4: Simplify right side
    68,112.84x = 2,923,995,436.37
  5. Step 5: Solve for x
    x = 2,923,995,436.37/68,112.84
  6. Step 6: Final answer
    x = 42,928.70

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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.