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Finding the Fourth Proportional to 131.24, 196.44 and 70.29

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Solution

The fourth proportional to 131.24, 196.44 and 70.29 is: 105.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.24 : 196.44 = 70.29 : x
  2. Step 2: Convert to fraction form
    131.24/196.44 = 70.29/x
  3. Step 3: Cross multiply
    131.24x = 196.44 × 70.29
  4. Step 4: Simplify right side
    131.24x = 13,807.77
  5. Step 5: Solve for x
    x = 13,807.77/131.24
  6. Step 6: Final answer
    x = 105.21

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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.