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Finding the Fourth Proportional to 153.05, 228.54 and 139.37

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Solution

The fourth proportional to 153.05, 228.54 and 139.37 is: 208.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.05 : 228.54 = 139.37 : x
  2. Step 2: Convert to fraction form
    153.05/228.54 = 139.37/x
  3. Step 3: Cross multiply
    153.05x = 228.54 × 139.37
  4. Step 4: Simplify right side
    153.05x = 31,850.92
  5. Step 5: Solve for x
    x = 31,850.92/153.05
  6. Step 6: Final answer
    x = 208.11

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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.