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Finding the Fourth Proportional to 124.48, 185.60 and 107.20

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Solution

The fourth proportional to 124.48, 185.60 and 107.20 is: 159.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.48 : 185.60 = 107.20 : x
  2. Step 2: Convert to fraction form
    124.48/185.60 = 107.20/x
  3. Step 3: Cross multiply
    124.48x = 185.60 × 107.20
  4. Step 4: Simplify right side
    124.48x = 19,896.32
  5. Step 5: Solve for x
    x = 19,896.32/124.48
  6. Step 6: Final answer
    x = 159.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.