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Finding the Fourth Proportional to 202.23, 303.18 and 72.16

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Solution

The fourth proportional to 202.23, 303.18 and 72.16 is: 108.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.23 : 303.18 = 72.16 : x
  2. Step 2: Convert to fraction form
    202.23/303.18 = 72.16/x
  3. Step 3: Cross multiply
    202.23x = 303.18 × 72.16
  4. Step 4: Simplify right side
    202.23x = 21,877.59
  5. Step 5: Solve for x
    x = 21,877.59/202.23
  6. Step 6: Final answer
    x = 108.18

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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.