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Finding the Fourth Proportional to 130.94, 196.40 and 45.38

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Solution

The fourth proportional to 130.94, 196.40 and 45.38 is: 68.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.94 : 196.40 = 45.38 : x
  2. Step 2: Convert to fraction form
    130.94/196.40 = 45.38/x
  3. Step 3: Cross multiply
    130.94x = 196.40 × 45.38
  4. Step 4: Simplify right side
    130.94x = 8,911.76
  5. Step 5: Solve for x
    x = 8,911.76/130.94
  6. Step 6: Final answer
    x = 68.06

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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.