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Finding the Fourth Proportional to 135,964.80, 203,889.60 and 65,865.60

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Solution

The fourth proportional to 135,964.80, 203,889.60 and 65,865.60 is: 98,770.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,964.80 : 203,889.60 = 65,865.60 : x
  2. Step 2: Convert to fraction form
    135,964.80/203,889.60 = 65,865.60/x
  3. Step 3: Cross multiply
    135,964.80x = 203,889.60 × 65,865.60
  4. Step 4: Simplify right side
    135,964.80x = 13,429,310,837.76
  5. Step 5: Solve for x
    x = 13,429,310,837.76/135,964.80
  6. Step 6: Final answer
    x = 98,770.50

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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.