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Finding the Fourth Proportional to 135,049.21, 202,609.01 and 78,937.20

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Solution

The fourth proportional to 135,049.21, 202,609.01 and 78,937.20 is: 118,426.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,049.21 : 202,609.01 = 78,937.20 : x
  2. Step 2: Convert to fraction form
    135,049.21/202,609.01 = 78,937.20/x
  3. Step 3: Cross multiply
    135,049.21x = 202,609.01 × 78,937.20
  4. Step 4: Simplify right side
    135,049.21x = 15,993,388,141.52
  5. Step 5: Solve for x
    x = 15,993,388,141.52/135,049.21
  6. Step 6: Final answer
    x = 118,426.38

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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.