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Finding the Fourth Proportional to 137.86, 206.61 and 92.08

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Solution

The fourth proportional to 137.86, 206.61 and 92.08 is: 138.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.86 : 206.61 = 92.08 : x
  2. Step 2: Convert to fraction form
    137.86/206.61 = 92.08/x
  3. Step 3: Cross multiply
    137.86x = 206.61 × 92.08
  4. Step 4: Simplify right side
    137.86x = 19,024.65
  5. Step 5: Solve for x
    x = 19,024.65/137.86
  6. Step 6: Final answer
    x = 138.00

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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.