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Finding the Fourth Proportional to 164.07, 245.72 and 91.89

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Solution

The fourth proportional to 164.07, 245.72 and 91.89 is: 137.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.07 : 245.72 = 91.89 : x
  2. Step 2: Convert to fraction form
    164.07/245.72 = 91.89/x
  3. Step 3: Cross multiply
    164.07x = 245.72 × 91.89
  4. Step 4: Simplify right side
    164.07x = 22,578.75
  5. Step 5: Solve for x
    x = 22,578.75/164.07
  6. Step 6: Final answer
    x = 137.62

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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.