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Finding the Fourth Proportional to 239.15, 358.61 and 102.12

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Solution

The fourth proportional to 239.15, 358.61 and 102.12 is: 153.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.15 : 358.61 = 102.12 : x
  2. Step 2: Convert to fraction form
    239.15/358.61 = 102.12/x
  3. Step 3: Cross multiply
    239.15x = 358.61 × 102.12
  4. Step 4: Simplify right side
    239.15x = 36,620.74
  5. Step 5: Solve for x
    x = 36,620.74/239.15
  6. Step 6: Final answer
    x = 153.13

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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.