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Finding the Fourth Proportional to 124.78, 187.14 and 56.27

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Solution

The fourth proportional to 124.78, 187.14 and 56.27 is: 84.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.78 : 187.14 = 56.27 : x
  2. Step 2: Convert to fraction form
    124.78/187.14 = 56.27/x
  3. Step 3: Cross multiply
    124.78x = 187.14 × 56.27
  4. Step 4: Simplify right side
    124.78x = 10,529.43
  5. Step 5: Solve for x
    x = 10,529.43/124.78
  6. Step 6: Final answer
    x = 84.39

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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.