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Finding the Fourth Proportional to 187.05, 258.03 and 124.80

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Solution

The fourth proportional to 187.05, 258.03 and 124.80 is: 172.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.05 : 258.03 = 124.80 : x
  2. Step 2: Convert to fraction form
    187.05/258.03 = 124.80/x
  3. Step 3: Cross multiply
    187.05x = 258.03 × 124.80
  4. Step 4: Simplify right side
    187.05x = 32,202.14
  5. Step 5: Solve for x
    x = 32,202.14/187.05
  6. Step 6: Final answer
    x = 172.16

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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.