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Finding the Fourth Proportional to 155.70, 233.82 and 87.48

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Solution

The fourth proportional to 155.70, 233.82 and 87.48 is: 131.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.70 : 233.82 = 87.48 : x
  2. Step 2: Convert to fraction form
    155.70/233.82 = 87.48/x
  3. Step 3: Cross multiply
    155.70x = 233.82 × 87.48
  4. Step 4: Simplify right side
    155.70x = 20,454.57
  5. Step 5: Solve for x
    x = 20,454.57/155.70
  6. Step 6: Final answer
    x = 131.37

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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.