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Finding the Fourth Proportional to 104, 143.60 and 69.56

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Solution

The fourth proportional to 104, 143.60 and 69.56 is: 96.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    104 : 143.60 = 69.56 : x
  2. Step 2: Convert to fraction form
    104/143.60 = 69.56/x
  3. Step 3: Cross multiply
    104x = 143.60 × 69.56
  4. Step 4: Simplify right side
    104x = 9,988.82
  5. Step 5: Solve for x
    x = 9,988.82/104
  6. Step 6: Final answer
    x = 96.05

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Why These Related Problems?

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