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Finding the Fourth Proportional to 156.89, 215.59 and 130.97

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Solution

The fourth proportional to 156.89, 215.59 and 130.97 is: 179.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.89 : 215.59 = 130.97 : x
  2. Step 2: Convert to fraction form
    156.89/215.59 = 130.97/x
  3. Step 3: Cross multiply
    156.89x = 215.59 × 130.97
  4. Step 4: Simplify right side
    156.89x = 28,235.82
  5. Step 5: Solve for x
    x = 28,235.82/156.89
  6. Step 6: Final answer
    x = 179.97

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.