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Finding the Fourth Proportional to 68,638.92, 102,974.38 and 21,888.20

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Solution

The fourth proportional to 68,638.92, 102,974.38 and 21,888.20 is: 32,837.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,638.92 : 102,974.38 = 21,888.20 : x
  2. Step 2: Convert to fraction form
    68,638.92/102,974.38 = 21,888.20/x
  3. Step 3: Cross multiply
    68,638.92x = 102,974.38 × 21,888.20
  4. Step 4: Simplify right side
    68,638.92x = 2,253,923,824.32
  5. Step 5: Solve for x
    x = 2,253,923,824.32/68,638.92
  6. Step 6: Final answer
    x = 32,837.40

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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.