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Finding the Fourth Proportional to 205,516.70, 308,202.15 and 72,401.30

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Solution

The fourth proportional to 205,516.70, 308,202.15 and 72,401.30 is: 108,576.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,516.70 : 308,202.15 = 72,401.30 : x
  2. Step 2: Convert to fraction form
    205,516.70/308,202.15 = 72,401.30/x
  3. Step 3: Cross multiply
    205,516.70x = 308,202.15 × 72,401.30
  4. Step 4: Simplify right side
    205,516.70x = 22,314,236,322.80
  5. Step 5: Solve for x
    x = 22,314,236,322.80/205,516.70
  6. Step 6: Final answer
    x = 108,576.27

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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.