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Finding the Fourth Proportional to 68,647.32, 102,960.40 and 18,731.48

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Solution

The fourth proportional to 68,647.32, 102,960.40 and 18,731.48 is: 28,094.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,647.32 : 102,960.40 = 18,731.48 : x
  2. Step 2: Convert to fraction form
    68,647.32/102,960.40 = 18,731.48/x
  3. Step 3: Cross multiply
    68,647.32x = 102,960.40 × 18,731.48
  4. Step 4: Simplify right side
    68,647.32x = 1,928,600,673.39
  5. Step 5: Solve for x
    x = 1,928,600,673.39/68,647.32
  6. Step 6: Final answer
    x = 28,094.33

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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.