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Finding the Fourth Proportional to 103.32, 153.90 and 100.98

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Solution

The fourth proportional to 103.32, 153.90 and 100.98 is: 150.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.32 : 153.90 = 100.98 : x
  2. Step 2: Convert to fraction form
    103.32/153.90 = 100.98/x
  3. Step 3: Cross multiply
    103.32x = 153.90 × 100.98
  4. Step 4: Simplify right side
    103.32x = 15,540.82
  5. Step 5: Solve for x
    x = 15,540.82/103.32
  6. Step 6: Final answer
    x = 150.41

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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.