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Finding the Fourth Proportional to 124.16, 185.63 and 105.12

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Solution

The fourth proportional to 124.16, 185.63 and 105.12 is: 157.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.16 : 185.63 = 105.12 : x
  2. Step 2: Convert to fraction form
    124.16/185.63 = 105.12/x
  3. Step 3: Cross multiply
    124.16x = 185.63 × 105.12
  4. Step 4: Simplify right side
    124.16x = 19,512.69
  5. Step 5: Solve for x
    x = 19,512.69/124.16
  6. Step 6: Final answer
    x = 157.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.