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Finding the Fourth Proportional to 129.51, 193.21 and 125.98

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Solution

The fourth proportional to 129.51, 193.21 and 125.98 is: 187.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.51 : 193.21 = 125.98 : x
  2. Step 2: Convert to fraction form
    129.51/193.21 = 125.98/x
  3. Step 3: Cross multiply
    129.51x = 193.21 × 125.98
  4. Step 4: Simplify right side
    129.51x = 24,340.70
  5. Step 5: Solve for x
    x = 24,340.70/129.51
  6. Step 6: Final answer
    x = 187.94

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.