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Finding the Fourth Proportional to 130.86, 196.07 and 69.98

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Solution

The fourth proportional to 130.86, 196.07 and 69.98 is: 104.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.86 : 196.07 = 69.98 : x
  2. Step 2: Convert to fraction form
    130.86/196.07 = 69.98/x
  3. Step 3: Cross multiply
    130.86x = 196.07 × 69.98
  4. Step 4: Simplify right side
    130.86x = 13,719.65
  5. Step 5: Solve for x
    x = 13,719.65/130.86
  6. Step 6: Final answer
    x = 104.84

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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.