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Finding the Fourth Proportional to 100.62, 149.74 and 100.32

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Solution

The fourth proportional to 100.62, 149.74 and 100.32 is: 149.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.62 : 149.74 = 100.32 : x
  2. Step 2: Convert to fraction form
    100.62/149.74 = 100.32/x
  3. Step 3: Cross multiply
    100.62x = 149.74 × 100.32
  4. Step 4: Simplify right side
    100.62x = 15,021.17
  5. Step 5: Solve for x
    x = 15,021.17/100.62
  6. Step 6: Final answer
    x = 149.29

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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.