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Finding the Fourth Proportional to 113.32, 156.24 and 93.88

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Solution

The fourth proportional to 113.32, 156.24 and 93.88 is: 129.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.32 : 156.24 = 93.88 : x
  2. Step 2: Convert to fraction form
    113.32/156.24 = 93.88/x
  3. Step 3: Cross multiply
    113.32x = 156.24 × 93.88
  4. Step 4: Simplify right side
    113.32x = 14,667.81
  5. Step 5: Solve for x
    x = 14,667.81/113.32
  6. Step 6: Final answer
    x = 129.44

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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.