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Finding the Fourth Proportional to 103.47, 143.44 and 98.26

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Solution

The fourth proportional to 103.47, 143.44 and 98.26 is: 136.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.47 : 143.44 = 98.26 : x
  2. Step 2: Convert to fraction form
    103.47/143.44 = 98.26/x
  3. Step 3: Cross multiply
    103.47x = 143.44 × 98.26
  4. Step 4: Simplify right side
    103.47x = 14,094.41
  5. Step 5: Solve for x
    x = 14,094.41/103.47
  6. Step 6: Final answer
    x = 136.22

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.