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Finding the Fourth Proportional to 236.21, 354.09 and 99.10

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Solution

The fourth proportional to 236.21, 354.09 and 99.10 is: 148.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.21 : 354.09 = 99.10 : x
  2. Step 2: Convert to fraction form
    236.21/354.09 = 99.10/x
  3. Step 3: Cross multiply
    236.21x = 354.09 × 99.10
  4. Step 4: Simplify right side
    236.21x = 35,088.55
  5. Step 5: Solve for x
    x = 35,088.55/236.21
  6. Step 6: Final answer
    x = 148.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.