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Finding the Fourth Proportional to 189.10, 260.80 and 130.12

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Solution

The fourth proportional to 189.10, 260.80 and 130.12 is: 179.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.10 : 260.80 = 130.12 : x
  2. Step 2: Convert to fraction form
    189.10/260.80 = 130.12/x
  3. Step 3: Cross multiply
    189.10x = 260.80 × 130.12
  4. Step 4: Simplify right side
    189.10x = 33,935.30
  5. Step 5: Solve for x
    x = 33,935.30/189.10
  6. Step 6: Final answer
    x = 179.46

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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.