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Finding the Fourth Proportional to 104.98, 143.03 and 102.76

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Solution

The fourth proportional to 104.98, 143.03 and 102.76 is: 140.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.98 : 143.03 = 102.76 : x
  2. Step 2: Convert to fraction form
    104.98/143.03 = 102.76/x
  3. Step 3: Cross multiply
    104.98x = 143.03 × 102.76
  4. Step 4: Simplify right side
    104.98x = 14,697.76
  5. Step 5: Solve for x
    x = 14,697.76/104.98
  6. Step 6: Final answer
    x = 140.01

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.