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Finding the Fourth Proportional to 156.59, 234.79 and 53.87

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Solution

The fourth proportional to 156.59, 234.79 and 53.87 is: 80.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.59 : 234.79 = 53.87 : x
  2. Step 2: Convert to fraction form
    156.59/234.79 = 53.87/x
  3. Step 3: Cross multiply
    156.59x = 234.79 × 53.87
  4. Step 4: Simplify right side
    156.59x = 12,648.14
  5. Step 5: Solve for x
    x = 12,648.14/156.59
  6. Step 6: Final answer
    x = 80.77

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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.