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Finding the Fourth Proportional to 147.36, 219.58 and 131.21

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Solution

The fourth proportional to 147.36, 219.58 and 131.21 is: 195.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.36 : 219.58 = 131.21 : x
  2. Step 2: Convert to fraction form
    147.36/219.58 = 131.21/x
  3. Step 3: Cross multiply
    147.36x = 219.58 × 131.21
  4. Step 4: Simplify right side
    147.36x = 28,809.67
  5. Step 5: Solve for x
    x = 28,809.67/147.36
  6. Step 6: Final answer
    x = 195.51

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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.