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Finding the Fourth Proportional to 68,610.90, 102,901.94 and 19,351.38

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Solution

The fourth proportional to 68,610.90, 102,901.94 and 19,351.38 is: 29,023.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,610.90 : 102,901.94 = 19,351.38 : x
  2. Step 2: Convert to fraction form
    68,610.90/102,901.94 = 19,351.38/x
  3. Step 3: Cross multiply
    68,610.90x = 102,901.94 × 19,351.38
  4. Step 4: Simplify right side
    68,610.90x = 1,991,294,543.68
  5. Step 5: Solve for x
    x = 1,991,294,543.68/68,610.90
  6. Step 6: Final answer
    x = 29,023.01

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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.