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Finding the Fourth Proportional to 124.51, 186.78 and 52.39

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Solution

The fourth proportional to 124.51, 186.78 and 52.39 is: 78.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.51 : 186.78 = 52.39 : x
  2. Step 2: Convert to fraction form
    124.51/186.78 = 52.39/x
  3. Step 3: Cross multiply
    124.51x = 186.78 × 52.39
  4. Step 4: Simplify right side
    124.51x = 9,785.40
  5. Step 5: Solve for x
    x = 9,785.40/124.51
  6. Step 6: Final answer
    x = 78.59

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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.