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Finding the Fourth Proportional to 133.18, 199.74 and 56.15

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Solution

The fourth proportional to 133.18, 199.74 and 56.15 is: 84.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.18 : 199.74 = 56.15 : x
  2. Step 2: Convert to fraction form
    133.18/199.74 = 56.15/x
  3. Step 3: Cross multiply
    133.18x = 199.74 × 56.15
  4. Step 4: Simplify right side
    133.18x = 11,214.40
  5. Step 5: Solve for x
    x = 11,214.40/133.18
  6. Step 6: Final answer
    x = 84.20

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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.