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Finding the Fourth Proportional to 103.95, 155.93 and 49.89

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Solution

The fourth proportional to 103.95, 155.93 and 49.89 is: 74.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.95 : 155.93 = 49.89 : x
  2. Step 2: Convert to fraction form
    103.95/155.93 = 49.89/x
  3. Step 3: Cross multiply
    103.95x = 155.93 × 49.89
  4. Step 4: Simplify right side
    103.95x = 7,779.10
  5. Step 5: Solve for x
    x = 7,779.10/103.95
  6. Step 6: Final answer
    x = 74.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.