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Finding the Fourth Proportional to 159.40, 238.96 and 56.60

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Solution

The fourth proportional to 159.40, 238.96 and 56.60 is: 84.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.40 : 238.96 = 56.60 : x
  2. Step 2: Convert to fraction form
    159.40/238.96 = 56.60/x
  3. Step 3: Cross multiply
    159.40x = 238.96 × 56.60
  4. Step 4: Simplify right side
    159.40x = 13,525.14
  5. Step 5: Solve for x
    x = 13,525.14/159.40
  6. Step 6: Final answer
    x = 84.85

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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.