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Finding the Fourth Proportional to 104.58, 143.46 and 101.88

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Solution

The fourth proportional to 104.58, 143.46 and 101.88 is: 139.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.58 : 143.46 = 101.88 : x
  2. Step 2: Convert to fraction form
    104.58/143.46 = 101.88/x
  3. Step 3: Cross multiply
    104.58x = 143.46 × 101.88
  4. Step 4: Simplify right side
    104.58x = 14,615.70
  5. Step 5: Solve for x
    x = 14,615.70/104.58
  6. Step 6: Final answer
    x = 139.76

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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.