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Finding the Fourth Proportional to 68,428.80, 102,700.80 and 33,398.40

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Solution

The fourth proportional to 68,428.80, 102,700.80 and 33,398.40 is: 50,125.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,428.80 : 102,700.80 = 33,398.40 : x
  2. Step 2: Convert to fraction form
    68,428.80/102,700.80 = 33,398.40/x
  3. Step 3: Cross multiply
    68,428.80x = 102,700.80 × 33,398.40
  4. Step 4: Simplify right side
    68,428.80x = 3,430,042,398.72
  5. Step 5: Solve for x
    x = 3,430,042,398.72/68,428.80
  6. Step 6: Final answer
    x = 50,125.71

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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.