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Finding the Fourth Proportional to 124.15, 187.14 and 113.89

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Solution

The fourth proportional to 124.15, 187.14 and 113.89 is: 171.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.15 : 187.14 = 113.89 : x
  2. Step 2: Convert to fraction form
    124.15/187.14 = 113.89/x
  3. Step 3: Cross multiply
    124.15x = 187.14 × 113.89
  4. Step 4: Simplify right side
    124.15x = 21,313.37
  5. Step 5: Solve for x
    x = 21,313.37/124.15
  6. Step 6: Final answer
    x = 171.67

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.