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Finding the Fourth Proportional to 135,231.40, 202,847.10 and 79,935.40

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Solution

The fourth proportional to 135,231.40, 202,847.10 and 79,935.40 is: 119,903.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,231.40 : 202,847.10 = 79,935.40 : x
  2. Step 2: Convert to fraction form
    135,231.40/202,847.10 = 79,935.40/x
  3. Step 3: Cross multiply
    135,231.40x = 202,847.10 × 79,935.40
  4. Step 4: Simplify right side
    135,231.40x = 16,214,664,077.34
  5. Step 5: Solve for x
    x = 16,214,664,077.34/135,231.40
  6. Step 6: Final answer
    x = 119,903.10

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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.