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Finding the Fourth Proportional to 160.03, 239.95 and 81.90

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Solution

The fourth proportional to 160.03, 239.95 and 81.90 is: 122.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.03 : 239.95 = 81.90 : x
  2. Step 2: Convert to fraction form
    160.03/239.95 = 81.90/x
  3. Step 3: Cross multiply
    160.03x = 239.95 × 81.90
  4. Step 4: Simplify right side
    160.03x = 19,651.51
  5. Step 5: Solve for x
    x = 19,651.51/160.03
  6. Step 6: Final answer
    x = 122.80

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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.