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Finding the Fourth Proportional to 178.09, 245.72 and 104.36

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Solution

The fourth proportional to 178.09, 245.72 and 104.36 is: 143.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.09 : 245.72 = 104.36 : x
  2. Step 2: Convert to fraction form
    178.09/245.72 = 104.36/x
  3. Step 3: Cross multiply
    178.09x = 245.72 × 104.36
  4. Step 4: Simplify right side
    178.09x = 25,643.34
  5. Step 5: Solve for x
    x = 25,643.34/178.09
  6. Step 6: Final answer
    x = 143.99

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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.