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Finding the Fourth Proportional to 100.31, 149.40 and 96.19

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Solution

The fourth proportional to 100.31, 149.40 and 96.19 is: 143.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.31 : 149.40 = 96.19 : x
  2. Step 2: Convert to fraction form
    100.31/149.40 = 96.19/x
  3. Step 3: Cross multiply
    100.31x = 149.40 × 96.19
  4. Step 4: Simplify right side
    100.31x = 14,370.41
  5. Step 5: Solve for x
    x = 14,370.41/100.31
  6. Step 6: Final answer
    x = 143.27

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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.