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Finding the Fourth Proportional to 100.09, 149.03 and 99.37

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Solution

The fourth proportional to 100.09, 149.03 and 99.37 is: 147.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.09 : 149.03 = 99.37 : x
  2. Step 2: Convert to fraction form
    100.09/149.03 = 99.37/x
  3. Step 3: Cross multiply
    100.09x = 149.03 × 99.37
  4. Step 4: Simplify right side
    100.09x = 14,809.11
  5. Step 5: Solve for x
    x = 14,809.11/100.09
  6. Step 6: Final answer
    x = 147.96

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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.