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Finding the Fourth Proportional to 210.01, 289.81 and 122.73

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Solution

The fourth proportional to 210.01, 289.81 and 122.73 is: 169.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.01 : 289.81 = 122.73 : x
  2. Step 2: Convert to fraction form
    210.01/289.81 = 122.73/x
  3. Step 3: Cross multiply
    210.01x = 289.81 × 122.73
  4. Step 4: Simplify right side
    210.01x = 35,567.77
  5. Step 5: Solve for x
    x = 35,567.77/210.01
  6. Step 6: Final answer
    x = 169.36

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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.