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Finding the Fourth Proportional to 104.13, 143.34 and 90.23

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Solution

The fourth proportional to 104.13, 143.34 and 90.23 is: 124.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.13 : 143.34 = 90.23 : x
  2. Step 2: Convert to fraction form
    104.13/143.34 = 90.23/x
  3. Step 3: Cross multiply
    104.13x = 143.34 × 90.23
  4. Step 4: Simplify right side
    104.13x = 12,933.93
  5. Step 5: Solve for x
    x = 12,933.93/104.13
  6. Step 6: Final answer
    x = 124.21

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.