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Finding the Fourth Proportional to 187.01, 257.80 and 131.58

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Solution

The fourth proportional to 187.01, 257.80 and 131.58 is: 181.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.01 : 257.80 = 131.58 : x
  2. Step 2: Convert to fraction form
    187.01/257.80 = 131.58/x
  3. Step 3: Cross multiply
    187.01x = 257.80 × 131.58
  4. Step 4: Simplify right side
    187.01x = 33,920.04
  5. Step 5: Solve for x
    x = 33,920.04/187.01
  6. Step 6: Final answer
    x = 181.39

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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.