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Finding the Fourth Proportional to 124.79, 186.30 and 120.51

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Solution

The fourth proportional to 124.79, 186.30 and 120.51 is: 179.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.79 : 186.30 = 120.51 : x
  2. Step 2: Convert to fraction form
    124.79/186.30 = 120.51/x
  3. Step 3: Cross multiply
    124.79x = 186.30 × 120.51
  4. Step 4: Simplify right side
    124.79x = 22,451.01
  5. Step 5: Solve for x
    x = 22,451.01/124.79
  6. Step 6: Final answer
    x = 179.92

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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.