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Finding the Fourth Proportional to 104.48, 143.40 and 95.21

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Solution

The fourth proportional to 104.48, 143.40 and 95.21 is: 130.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.48 : 143.40 = 95.21 : x
  2. Step 2: Convert to fraction form
    104.48/143.40 = 95.21/x
  3. Step 3: Cross multiply
    104.48x = 143.40 × 95.21
  4. Step 4: Simplify right side
    104.48x = 13,652.40
  5. Step 5: Solve for x
    x = 13,652.40/104.48
  6. Step 6: Final answer
    x = 130.68

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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.