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Finding the Fourth Proportional to 222.02, 306.42 and 139.10

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Solution

The fourth proportional to 222.02, 306.42 and 139.10 is: 191.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.02 : 306.42 = 139.10 : x
  2. Step 2: Convert to fraction form
    222.02/306.42 = 139.10/x
  3. Step 3: Cross multiply
    222.02x = 306.42 × 139.10
  4. Step 4: Simplify right side
    222.02x = 42,621.49
  5. Step 5: Solve for x
    x = 42,621.49/222.02
  6. Step 6: Final answer
    x = 191.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.