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Finding the Fourth Proportional to 68,745.50, 103,134.36 and 21,358.16

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Solution

The fourth proportional to 68,745.50, 103,134.36 and 21,358.16 is: 32,042.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,745.50 : 103,134.36 = 21,358.16 : x
  2. Step 2: Convert to fraction form
    68,745.50/103,134.36 = 21,358.16/x
  3. Step 3: Cross multiply
    68,745.50x = 103,134.36 × 21,358.16
  4. Step 4: Simplify right side
    68,745.50x = 2,202,760,162.38
  5. Step 5: Solve for x
    x = 2,202,760,162.38/68,745.50
  6. Step 6: Final answer
    x = 32,042.25

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1.5x scale

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.