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Finding the Fourth Proportional to 105.00, 157.33 and 47.21

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Solution

The fourth proportional to 105.00, 157.33 and 47.21 is: 70.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.00 : 157.33 = 47.21 : x
  2. Step 2: Convert to fraction form
    105.00/157.33 = 47.21/x
  3. Step 3: Cross multiply
    105.00x = 157.33 × 47.21
  4. Step 4: Simplify right side
    105.00x = 7,426.82
  5. Step 5: Solve for x
    x = 7,426.82/105.00
  6. Step 6: Final answer
    x = 70.73

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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.