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Finding the Fourth Proportional to 74.76, 103.14 and 50.19

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Solution

The fourth proportional to 74.76, 103.14 and 50.19 is: 69.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.76 : 103.14 = 50.19 : x
  2. Step 2: Convert to fraction form
    74.76/103.14 = 50.19/x
  3. Step 3: Cross multiply
    74.76x = 103.14 × 50.19
  4. Step 4: Simplify right side
    74.76x = 5,176.60
  5. Step 5: Solve for x
    x = 5,176.60/74.76
  6. Step 6: Final answer
    x = 69.24

Related Problems

Find fourth proportional to 37.38, 51.57 and 25.10
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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.