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Finding the Fourth Proportional to 190.60, 263.08 and 124.40

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Solution

The fourth proportional to 190.60, 263.08 and 124.40 is: 171.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.60 : 263.08 = 124.40 : x
  2. Step 2: Convert to fraction form
    190.60/263.08 = 124.40/x
  3. Step 3: Cross multiply
    190.60x = 263.08 × 124.40
  4. Step 4: Simplify right side
    190.60x = 32,725.84
  5. Step 5: Solve for x
    x = 32,725.84/190.60
  6. Step 6: Final answer
    x = 171.70

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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.