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Finding the Fourth Proportional to 124.30, 186.63 and 73

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Solution

The fourth proportional to 124.30, 186.63 and 73 is: 109.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.30 : 186.63 = 73 : x
  2. Step 2: Convert to fraction form
    124.30/186.63 = 73/x
  3. Step 3: Cross multiply
    124.30x = 186.63 × 73
  4. Step 4: Simplify right side
    124.30x = 13,623.99
  5. Step 5: Solve for x
    x = 13,623.99/124.30
  6. Step 6: Final answer
    x = 109.61

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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.