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Finding the Fourth Proportional to 173.86, 260.90 and 105.40

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Solution

The fourth proportional to 173.86, 260.90 and 105.40 is: 158.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.86 : 260.90 = 105.40 : x
  2. Step 2: Convert to fraction form
    173.86/260.90 = 105.40/x
  3. Step 3: Cross multiply
    173.86x = 260.90 × 105.40
  4. Step 4: Simplify right side
    173.86x = 27,498.33
  5. Step 5: Solve for x
    x = 27,498.33/173.86
  6. Step 6: Final answer
    x = 158.16

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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.