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Finding the Fourth Proportional to 49.10, 72.90 and 46.94

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Solution

The fourth proportional to 49.10, 72.90 and 46.94 is: 69.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.10 : 72.90 = 46.94 : x
  2. Step 2: Convert to fraction form
    49.10/72.90 = 46.94/x
  3. Step 3: Cross multiply
    49.10x = 72.90 × 46.94
  4. Step 4: Simplify right side
    49.10x = 3,421.93
  5. Step 5: Solve for x
    x = 3,421.93/49.10
  6. Step 6: Final answer
    x = 69.69

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.