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Finding the Fourth Proportional to 161.02, 239.68 and 153.55

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Solution

The fourth proportional to 161.02, 239.68 and 153.55 is: 228.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.02 : 239.68 = 153.55 : x
  2. Step 2: Convert to fraction form
    161.02/239.68 = 153.55/x
  3. Step 3: Cross multiply
    161.02x = 239.68 × 153.55
  4. Step 4: Simplify right side
    161.02x = 36,803.36
  5. Step 5: Solve for x
    x = 36,803.36/161.02
  6. Step 6: Final answer
    x = 228.56

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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.