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Finding the Fourth Proportional to 135,599.60, 203,431.80 and 65,421.20

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Solution

The fourth proportional to 135,599.60, 203,431.80 and 65,421.20 is: 98,147.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,599.60 : 203,431.80 = 65,421.20 : x
  2. Step 2: Convert to fraction form
    135,599.60/203,431.80 = 65,421.20/x
  3. Step 3: Cross multiply
    135,599.60x = 203,431.80 × 65,421.20
  4. Step 4: Simplify right side
    135,599.60x = 13,308,752,474.16
  5. Step 5: Solve for x
    x = 13,308,752,474.16/135,599.60
  6. Step 6: Final answer
    x = 98,147.43

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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.