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Finding the Fourth Proportional to 95.45, 143.69 and 65.21

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Solution

The fourth proportional to 95.45, 143.69 and 65.21 is: 98.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.45 : 143.69 = 65.21 : x
  2. Step 2: Convert to fraction form
    95.45/143.69 = 65.21/x
  3. Step 3: Cross multiply
    95.45x = 143.69 × 65.21
  4. Step 4: Simplify right side
    95.45x = 9,369.31
  5. Step 5: Solve for x
    x = 9,369.31/95.45
  6. Step 6: Final answer
    x = 98.16

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.