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Finding the Fourth Proportional to 155.10, 232.35 and 120.75

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Solution

The fourth proportional to 155.10, 232.35 and 120.75 is: 180.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.10 : 232.35 = 120.75 : x
  2. Step 2: Convert to fraction form
    155.10/232.35 = 120.75/x
  3. Step 3: Cross multiply
    155.10x = 232.35 × 120.75
  4. Step 4: Simplify right side
    155.10x = 28,056.26
  5. Step 5: Solve for x
    x = 28,056.26/155.10
  6. Step 6: Final answer
    x = 180.89

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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.