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Finding the Fourth Proportional to 68,608.80, 102,913.20 and 33,530.40

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Solution

The fourth proportional to 68,608.80, 102,913.20 and 33,530.40 is: 50,295.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,608.80 : 102,913.20 = 33,530.40 : x
  2. Step 2: Convert to fraction form
    68,608.80/102,913.20 = 33,530.40/x
  3. Step 3: Cross multiply
    68,608.80x = 102,913.20 × 33,530.40
  4. Step 4: Simplify right side
    68,608.80x = 3,450,720,761.28
  5. Step 5: Solve for x
    x = 3,450,720,761.28/68,608.80
  6. Step 6: Final answer
    x = 50,295.60

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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.