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Finding the Fourth Proportional to 68,645.80, 102,968.70 and 53,900.20

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Solution

The fourth proportional to 68,645.80, 102,968.70 and 53,900.20 is: 80,850.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,645.80 : 102,968.70 = 53,900.20 : x
  2. Step 2: Convert to fraction form
    68,645.80/102,968.70 = 53,900.20/x
  3. Step 3: Cross multiply
    68,645.80x = 102,968.70 × 53,900.20
  4. Step 4: Simplify right side
    68,645.80x = 5,550,033,523.74
  5. Step 5: Solve for x
    x = 5,550,033,523.74/68,645.80
  6. Step 6: Final answer
    x = 80,850.30

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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.