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Finding the Fourth Proportional to 104.23, 143.84 and 62.78

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Solution

The fourth proportional to 104.23, 143.84 and 62.78 is: 86.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.23 : 143.84 = 62.78 : x
  2. Step 2: Convert to fraction form
    104.23/143.84 = 62.78/x
  3. Step 3: Cross multiply
    104.23x = 143.84 × 62.78
  4. Step 4: Simplify right side
    104.23x = 9,030.28
  5. Step 5: Solve for x
    x = 9,030.28/104.23
  6. Step 6: Final answer
    x = 86.64

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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.