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Finding the Fourth Proportional to 189.06, 260.71 and 123.45

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Solution

The fourth proportional to 189.06, 260.71 and 123.45 is: 170.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.06 : 260.71 = 123.45 : x
  2. Step 2: Convert to fraction form
    189.06/260.71 = 123.45/x
  3. Step 3: Cross multiply
    189.06x = 260.71 × 123.45
  4. Step 4: Simplify right side
    189.06x = 32,184.65
  5. Step 5: Solve for x
    x = 32,184.65/189.06
  6. Step 6: Final answer
    x = 170.24

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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.