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Finding the Fourth Proportional to 79.49, 109.68 and 46.28

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Solution

The fourth proportional to 79.49, 109.68 and 46.28 is: 63.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.49 : 109.68 = 46.28 : x
  2. Step 2: Convert to fraction form
    79.49/109.68 = 46.28/x
  3. Step 3: Cross multiply
    79.49x = 109.68 × 46.28
  4. Step 4: Simplify right side
    79.49x = 5,075.99
  5. Step 5: Solve for x
    x = 5,075.99/79.49
  6. Step 6: Final answer
    x = 63.86

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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.