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Finding the Fourth Proportional to 142.21, 213.44 and 59.99

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Solution

The fourth proportional to 142.21, 213.44 and 59.99 is: 90.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.21 : 213.44 = 59.99 : x
  2. Step 2: Convert to fraction form
    142.21/213.44 = 59.99/x
  3. Step 3: Cross multiply
    142.21x = 213.44 × 59.99
  4. Step 4: Simplify right side
    142.21x = 12,802.90
  5. Step 5: Solve for x
    x = 12,802.90/142.21
  6. Step 6: Final answer
    x = 90.03

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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.