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Finding the Fourth Proportional to 135,601.20, 203,401.80 and 85,834.80

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Solution

The fourth proportional to 135,601.20, 203,401.80 and 85,834.80 is: 128,752.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,601.20 : 203,401.80 = 85,834.80 : x
  2. Step 2: Convert to fraction form
    135,601.20/203,401.80 = 85,834.80/x
  3. Step 3: Cross multiply
    135,601.20x = 203,401.80 × 85,834.80
  4. Step 4: Simplify right side
    135,601.20x = 17,458,952,822.64
  5. Step 5: Solve for x
    x = 17,458,952,822.64/135,601.20
  6. Step 6: Final answer
    x = 128,752.20

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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.