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Finding the Fourth Proportional to 68,247.38, 94,189.56 and 39,953

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Solution

The fourth proportional to 68,247.38, 94,189.56 and 39,953 is: 55,139.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,247.38 : 94,189.56 = 39,953 : x
  2. Step 2: Convert to fraction form
    68,247.38/94,189.56 = 39,953/x
  3. Step 3: Cross multiply
    68,247.38x = 94,189.56 × 39,953
  4. Step 4: Simplify right side
    68,247.38x = 3,763,155,490.68
  5. Step 5: Solve for x
    x = 3,763,155,490.68/68,247.38
  6. Step 6: Final answer
    x = 55,139.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.