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Finding the Fourth Proportional to 103.36, 153.98 and 98.68

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Solution

The fourth proportional to 103.36, 153.98 and 98.68 is: 147.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.36 : 153.98 = 98.68 : x
  2. Step 2: Convert to fraction form
    103.36/153.98 = 98.68/x
  3. Step 3: Cross multiply
    103.36x = 153.98 × 98.68
  4. Step 4: Simplify right side
    103.36x = 15,194.75
  5. Step 5: Solve for x
    x = 15,194.75/103.36
  6. Step 6: Final answer
    x = 147.01

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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.