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Finding the Fourth Proportional to 68,610.45, 102,912.58 and 28,612.97

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Solution

The fourth proportional to 68,610.45, 102,912.58 and 28,612.97 is: 42,918.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,610.45 : 102,912.58 = 28,612.97 : x
  2. Step 2: Convert to fraction form
    68,610.45/102,912.58 = 28,612.97/x
  3. Step 3: Cross multiply
    68,610.45x = 102,912.58 × 28,612.97
  4. Step 4: Simplify right side
    68,610.45x = 2,944,634,564.16
  5. Step 5: Solve for x
    x = 2,944,634,564.16/68,610.45
  6. Step 6: Final answer
    x = 42,918.16

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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.