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Finding the Fourth Proportional to 156.05, 215.34 and 93.93

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Solution

The fourth proportional to 156.05, 215.34 and 93.93 is: 129.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.05 : 215.34 = 93.93 : x
  2. Step 2: Convert to fraction form
    156.05/215.34 = 93.93/x
  3. Step 3: Cross multiply
    156.05x = 215.34 × 93.93
  4. Step 4: Simplify right side
    156.05x = 20,227.24
  5. Step 5: Solve for x
    x = 20,227.24/156.05
  6. Step 6: Final answer
    x = 129.62

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Why These Related Problems?

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