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Finding the Fourth Proportional to 103.99, 156.02 and 39.04

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Solution

The fourth proportional to 103.99, 156.02 and 39.04 is: 58.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.99 : 156.02 = 39.04 : x
  2. Step 2: Convert to fraction form
    103.99/156.02 = 39.04/x
  3. Step 3: Cross multiply
    103.99x = 156.02 × 39.04
  4. Step 4: Simplify right side
    103.99x = 6,091.02
  5. Step 5: Solve for x
    x = 6,091.02/103.99
  6. Step 6: Final answer
    x = 58.57

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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.