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Finding the Fourth Proportional to 201.12, 277.59 and 139.26

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Solution

The fourth proportional to 201.12, 277.59 and 139.26 is: 192.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.12 : 277.59 = 139.26 : x
  2. Step 2: Convert to fraction form
    201.12/277.59 = 139.26/x
  3. Step 3: Cross multiply
    201.12x = 277.59 × 139.26
  4. Step 4: Simplify right side
    201.12x = 38,657.18
  5. Step 5: Solve for x
    x = 38,657.18/201.12
  6. Step 6: Final answer
    x = 192.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.