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Finding the Fourth Proportional to 156.00, 234.00 and 47.79

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Solution

The fourth proportional to 156.00, 234.00 and 47.79 is: 71.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.00 : 234.00 = 47.79 : x
  2. Step 2: Convert to fraction form
    156.00/234.00 = 47.79/x
  3. Step 3: Cross multiply
    156.00x = 234.00 × 47.79
  4. Step 4: Simplify right side
    156.00x = 11,181.45
  5. Step 5: Solve for x
    x = 11,181.45/156.00
  6. Step 6: Final answer
    x = 71.68

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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.