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Finding the Fourth Proportional to 124.37, 186.56 and 76.31

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Solution

The fourth proportional to 124.37, 186.56 and 76.31 is: 114.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.37 : 186.56 = 76.31 : x
  2. Step 2: Convert to fraction form
    124.37/186.56 = 76.31/x
  3. Step 3: Cross multiply
    124.37x = 186.56 × 76.31
  4. Step 4: Simplify right side
    124.37x = 14,235.08
  5. Step 5: Solve for x
    x = 14,235.08/124.37
  6. Step 6: Final answer
    x = 114.46

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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.