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Finding the Fourth Proportional to 68,191.20, 101,998.80 and 61,221.60

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Solution

The fourth proportional to 68,191.20, 101,998.80 and 61,221.60 is: 91,573.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,191.20 : 101,998.80 = 61,221.60 : x
  2. Step 2: Convert to fraction form
    68,191.20/101,998.80 = 61,221.60/x
  3. Step 3: Cross multiply
    68,191.20x = 101,998.80 × 61,221.60
  4. Step 4: Simplify right side
    68,191.20x = 6,244,529,734.08
  5. Step 5: Solve for x
    x = 6,244,529,734.08/68,191.20
  6. Step 6: Final answer
    x = 91,573.84

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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.