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Finding the Fourth Proportional to 156.01, 215.31 and 93.84

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Solution

The fourth proportional to 156.01, 215.31 and 93.84 is: 129.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.01 : 215.31 = 93.84 : x
  2. Step 2: Convert to fraction form
    156.01/215.31 = 93.84/x
  3. Step 3: Cross multiply
    156.01x = 215.31 × 93.84
  4. Step 4: Simplify right side
    156.01x = 20,204.34
  5. Step 5: Solve for x
    x = 20,204.34/156.01
  6. Step 6: Final answer
    x = 129.51

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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.