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Finding the Fourth Proportional to 151.04, 208.46 and 85.56

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Solution

The fourth proportional to 151.04, 208.46 and 85.56 is: 118.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.04 : 208.46 = 85.56 : x
  2. Step 2: Convert to fraction form
    151.04/208.46 = 85.56/x
  3. Step 3: Cross multiply
    151.04x = 208.46 × 85.56
  4. Step 4: Simplify right side
    151.04x = 17,835.84
  5. Step 5: Solve for x
    x = 17,835.84/151.04
  6. Step 6: Final answer
    x = 118.09

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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.