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Finding the Fourth Proportional to 131.12, 181.06 and 109.02

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Solution

The fourth proportional to 131.12, 181.06 and 109.02 is: 150.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.12 : 181.06 = 109.02 : x
  2. Step 2: Convert to fraction form
    131.12/181.06 = 109.02/x
  3. Step 3: Cross multiply
    131.12x = 181.06 × 109.02
  4. Step 4: Simplify right side
    131.12x = 19,738.89
  5. Step 5: Solve for x
    x = 19,738.89/131.12
  6. Step 6: Final answer
    x = 150.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.