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Finding the Fourth Proportional to 68,936.54, 103,259.50 and 31,528.11

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Solution

The fourth proportional to 68,936.54, 103,259.50 and 31,528.11 is: 47,225.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,936.54 : 103,259.50 = 31,528.11 : x
  2. Step 2: Convert to fraction form
    68,936.54/103,259.50 = 31,528.11/x
  3. Step 3: Cross multiply
    68,936.54x = 103,259.50 × 31,528.11
  4. Step 4: Simplify right side
    68,936.54x = 3,255,576,874.55
  5. Step 5: Solve for x
    x = 3,255,576,874.55/68,936.54
  6. Step 6: Final answer
    x = 47,225.71

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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.