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Finding the Fourth Proportional to 156.84, 215.91 and 134.88

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Solution

The fourth proportional to 156.84, 215.91 and 134.88 is: 185.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.84 : 215.91 = 134.88 : x
  2. Step 2: Convert to fraction form
    156.84/215.91 = 134.88/x
  3. Step 3: Cross multiply
    156.84x = 215.91 × 134.88
  4. Step 4: Simplify right side
    156.84x = 29,121.94
  5. Step 5: Solve for x
    x = 29,121.94/156.84
  6. Step 6: Final answer
    x = 185.68

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.