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Finding the Fourth Proportional to 95.80, 143.60 and 40.99

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Solution

The fourth proportional to 95.80, 143.60 and 40.99 is: 61.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.80 : 143.60 = 40.99 : x
  2. Step 2: Convert to fraction form
    95.80/143.60 = 40.99/x
  3. Step 3: Cross multiply
    95.80x = 143.60 × 40.99
  4. Step 4: Simplify right side
    95.80x = 5,886.16
  5. Step 5: Solve for x
    x = 5,886.16/95.80
  6. Step 6: Final answer
    x = 61.44

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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.