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Finding the Fourth Proportional to 155.56, 233.34 and 131.68

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Solution

The fourth proportional to 155.56, 233.34 and 131.68 is: 197.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.56 : 233.34 = 131.68 : x
  2. Step 2: Convert to fraction form
    155.56/233.34 = 131.68/x
  3. Step 3: Cross multiply
    155.56x = 233.34 × 131.68
  4. Step 4: Simplify right side
    155.56x = 30,726.21
  5. Step 5: Solve for x
    x = 30,726.21/155.56
  6. Step 6: Final answer
    x = 197.52

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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.