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Finding the Fourth Proportional to 151.26, 228.12 and 139.38

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Solution

The fourth proportional to 151.26, 228.12 and 139.38 is: 210.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.26 : 228.12 = 139.38 : x
  2. Step 2: Convert to fraction form
    151.26/228.12 = 139.38/x
  3. Step 3: Cross multiply
    151.26x = 228.12 × 139.38
  4. Step 4: Simplify right side
    151.26x = 31,795.37
  5. Step 5: Solve for x
    x = 31,795.37/151.26
  6. Step 6: Final answer
    x = 210.20

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.