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Finding the Fourth Proportional to 124.63, 186.76 and 75.72

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Solution

The fourth proportional to 124.63, 186.76 and 75.72 is: 113.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.63 : 186.76 = 75.72 : x
  2. Step 2: Convert to fraction form
    124.63/186.76 = 75.72/x
  3. Step 3: Cross multiply
    124.63x = 186.76 × 75.72
  4. Step 4: Simplify right side
    124.63x = 14,141.47
  5. Step 5: Solve for x
    x = 14,141.47/124.63
  6. Step 6: Final answer
    x = 113.47

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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.