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Finding the Fourth Proportional to 149.04, 223.94 and 139.79

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Solution

The fourth proportional to 149.04, 223.94 and 139.79 is: 210.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.04 : 223.94 = 139.79 : x
  2. Step 2: Convert to fraction form
    149.04/223.94 = 139.79/x
  3. Step 3: Cross multiply
    149.04x = 223.94 × 139.79
  4. Step 4: Simplify right side
    149.04x = 31,305.48
  5. Step 5: Solve for x
    x = 31,305.48/149.04
  6. Step 6: Final answer
    x = 210.05

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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.