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Finding the Fourth Proportional to 152.21, 228.08 and 113.51

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Solution

The fourth proportional to 152.21, 228.08 and 113.51 is: 170.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.21 : 228.08 = 113.51 : x
  2. Step 2: Convert to fraction form
    152.21/228.08 = 113.51/x
  3. Step 3: Cross multiply
    152.21x = 228.08 × 113.51
  4. Step 4: Simplify right side
    152.21x = 25,890.21
  5. Step 5: Solve for x
    x = 25,890.21/152.21
  6. Step 6: Final answer
    x = 170.09

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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.