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Finding the Fourth Proportional to 155.05, 232.56 and 87.00

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Solution

The fourth proportional to 155.05, 232.56 and 87.00 is: 130.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.05 : 232.56 = 87.00 : x
  2. Step 2: Convert to fraction form
    155.05/232.56 = 87.00/x
  3. Step 3: Cross multiply
    155.05x = 232.56 × 87.00
  4. Step 4: Simplify right side
    155.05x = 20,231.85
  5. Step 5: Solve for x
    x = 20,231.85/155.05
  6. Step 6: Final answer
    x = 130.49

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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.