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Finding the Fourth Proportional to 164.05, 245.99 and 72.70

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Solution

The fourth proportional to 164.05, 245.99 and 72.70 is: 109.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.05 : 245.99 = 72.70 : x
  2. Step 2: Convert to fraction form
    164.05/245.99 = 72.70/x
  3. Step 3: Cross multiply
    164.05x = 245.99 × 72.70
  4. Step 4: Simplify right side
    164.05x = 17,883.04
  5. Step 5: Solve for x
    x = 17,883.04/164.05
  6. Step 6: Final answer
    x = 109.01

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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.