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Finding the Fourth Proportional to 202.18, 303.54 and 129.06

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Solution

The fourth proportional to 202.18, 303.54 and 129.06 is: 193.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.18 : 303.54 = 129.06 : x
  2. Step 2: Convert to fraction form
    202.18/303.54 = 129.06/x
  3. Step 3: Cross multiply
    202.18x = 303.54 × 129.06
  4. Step 4: Simplify right side
    202.18x = 39,172.71
  5. Step 5: Solve for x
    x = 39,172.71/202.18
  6. Step 6: Final answer
    x = 193.75

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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.