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Finding the Fourth Proportional to 95.19, 142.79 and 85.10

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Solution

The fourth proportional to 95.19, 142.79 and 85.10 is: 127.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.19 : 142.79 = 85.10 : x
  2. Step 2: Convert to fraction form
    95.19/142.79 = 85.10/x
  3. Step 3: Cross multiply
    95.19x = 142.79 × 85.10
  4. Step 4: Simplify right side
    95.19x = 12,150.29
  5. Step 5: Solve for x
    x = 12,150.29/95.19
  6. Step 6: Final answer
    x = 127.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.