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Finding the Fourth Proportional to 161.02, 241.02 and 128.40

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Solution

The fourth proportional to 161.02, 241.02 and 128.40 is: 192.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.02 : 241.02 = 128.40 : x
  2. Step 2: Convert to fraction form
    161.02/241.02 = 128.40/x
  3. Step 3: Cross multiply
    161.02x = 241.02 × 128.40
  4. Step 4: Simplify right side
    161.02x = 30,946.97
  5. Step 5: Solve for x
    x = 30,946.97/161.02
  6. Step 6: Final answer
    x = 192.19

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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.