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Finding the Fourth Proportional to 68,220.64, 102,331.12 and 26,638.48

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Solution

The fourth proportional to 68,220.64, 102,331.12 and 26,638.48 is: 39,957.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,220.64 : 102,331.12 = 26,638.48 : x
  2. Step 2: Convert to fraction form
    68,220.64/102,331.12 = 26,638.48/x
  3. Step 3: Cross multiply
    68,220.64x = 102,331.12 × 26,638.48
  4. Step 4: Simplify right side
    68,220.64x = 2,725,945,493.50
  5. Step 5: Solve for x
    x = 2,725,945,493.50/68,220.64
  6. Step 6: Final answer
    x = 39,957.78

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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.