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Finding the Fourth Proportional to 124.57, 186.81 and 47.53

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Solution

The fourth proportional to 124.57, 186.81 and 47.53 is: 71.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.57 : 186.81 = 47.53 : x
  2. Step 2: Convert to fraction form
    124.57/186.81 = 47.53/x
  3. Step 3: Cross multiply
    124.57x = 186.81 × 47.53
  4. Step 4: Simplify right side
    124.57x = 8,879.08
  5. Step 5: Solve for x
    x = 8,879.08/124.57
  6. Step 6: Final answer
    x = 71.28

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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.