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Finding the Fourth Proportional to 74.76, 103.14 and 45.64

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Solution

The fourth proportional to 74.76, 103.14 and 45.64 is: 62.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.76 : 103.14 = 45.64 : x
  2. Step 2: Convert to fraction form
    74.76/103.14 = 45.64/x
  3. Step 3: Cross multiply
    74.76x = 103.14 × 45.64
  4. Step 4: Simplify right side
    74.76x = 4,707.31
  5. Step 5: Solve for x
    x = 4,707.31/74.76
  6. Step 6: Final answer
    x = 62.97

Related Problems

Find fourth proportional to 37.38, 51.57 and 22.82
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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.