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Finding the Fourth Proportional to 158.79, 237.90 and 126.50

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Solution

The fourth proportional to 158.79, 237.90 and 126.50 is: 189.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.79 : 237.90 = 126.50 : x
  2. Step 2: Convert to fraction form
    158.79/237.90 = 126.50/x
  3. Step 3: Cross multiply
    158.79x = 237.90 × 126.50
  4. Step 4: Simplify right side
    158.79x = 30,093.63
  5. Step 5: Solve for x
    x = 30,093.63/158.79
  6. Step 6: Final answer
    x = 189.51

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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.