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Finding the Fourth Proportional to 155.37, 214.52 and 99.39

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Solution

The fourth proportional to 155.37, 214.52 and 99.39 is: 137.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.37 : 214.52 = 99.39 : x
  2. Step 2: Convert to fraction form
    155.37/214.52 = 99.39/x
  3. Step 3: Cross multiply
    155.37x = 214.52 × 99.39
  4. Step 4: Simplify right side
    155.37x = 21,321.45
  5. Step 5: Solve for x
    x = 21,321.45/155.37
  6. Step 6: Final answer
    x = 137.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.