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Finding the Fourth Proportional to 187.02, 257.60 and 131.66

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Solution

The fourth proportional to 187.02, 257.60 and 131.66 is: 181.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.02 : 257.60 = 131.66 : x
  2. Step 2: Convert to fraction form
    187.02/257.60 = 131.66/x
  3. Step 3: Cross multiply
    187.02x = 257.60 × 131.66
  4. Step 4: Simplify right side
    187.02x = 33,914.62
  5. Step 5: Solve for x
    x = 33,914.62/187.02
  6. Step 6: Final answer
    x = 181.35

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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.