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Finding the Fourth Proportional to 68,906.40, 95,085 and 38,689.35

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Solution

The fourth proportional to 68,906.40, 95,085 and 38,689.35 is: 53,388.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,906.40 : 95,085 = 38,689.35 : x
  2. Step 2: Convert to fraction form
    68,906.40/95,085 = 38,689.35/x
  3. Step 3: Cross multiply
    68,906.40x = 95,085 × 38,689.35
  4. Step 4: Simplify right side
    68,906.40x = 3,678,776,844.75
  5. Step 5: Solve for x
    x = 3,678,776,844.75/68,906.40
  6. Step 6: Final answer
    x = 53,388.03

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1.5x scale

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.