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Finding the Fourth Proportional to 104.79, 143.83 and 98.99

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Solution

The fourth proportional to 104.79, 143.83 and 98.99 is: 135.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.79 : 143.83 = 98.99 : x
  2. Step 2: Convert to fraction form
    104.79/143.83 = 98.99/x
  3. Step 3: Cross multiply
    104.79x = 143.83 × 98.99
  4. Step 4: Simplify right side
    104.79x = 14,237.12
  5. Step 5: Solve for x
    x = 14,237.12/104.79
  6. Step 6: Final answer
    x = 135.86

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.