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Finding the Fourth Proportional to 104.45, 155.51 and 103.02

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Solution

The fourth proportional to 104.45, 155.51 and 103.02 is: 153.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.45 : 155.51 = 103.02 : x
  2. Step 2: Convert to fraction form
    104.45/155.51 = 103.02/x
  3. Step 3: Cross multiply
    104.45x = 155.51 × 103.02
  4. Step 4: Simplify right side
    104.45x = 16,020.64
  5. Step 5: Solve for x
    x = 16,020.64/104.45
  6. Step 6: Final answer
    x = 153.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.