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Finding the Fourth Proportional to 236.90, 355.35 and 99.95

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Solution

The fourth proportional to 236.90, 355.35 and 99.95 is: 149.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.90 : 355.35 = 99.95 : x
  2. Step 2: Convert to fraction form
    236.90/355.35 = 99.95/x
  3. Step 3: Cross multiply
    236.90x = 355.35 × 99.95
  4. Step 4: Simplify right side
    236.90x = 35,515.46
  5. Step 5: Solve for x
    x = 35,515.46/236.90
  6. Step 6: Final answer
    x = 149.92

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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.