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Finding the Fourth Proportional to 208,082.68, 312,170.46 and 81,735.16

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Solution

The fourth proportional to 208,082.68, 312,170.46 and 81,735.16 is: 122,620.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,082.68 : 312,170.46 = 81,735.16 : x
  2. Step 2: Convert to fraction form
    208,082.68/312,170.46 = 81,735.16/x
  3. Step 3: Cross multiply
    208,082.68x = 312,170.46 × 81,735.16
  4. Step 4: Simplify right side
    208,082.68x = 25,515,302,495.37
  5. Step 5: Solve for x
    x = 25,515,302,495.37/208,082.68
  6. Step 6: Final answer
    x = 122,620.98

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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.