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Finding the Fourth Proportional to 78.23, 107.99 and 52.04

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Solution

The fourth proportional to 78.23, 107.99 and 52.04 is: 71.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78.23 : 107.99 = 52.04 : x
  2. Step 2: Convert to fraction form
    78.23/107.99 = 52.04/x
  3. Step 3: Cross multiply
    78.23x = 107.99 × 52.04
  4. Step 4: Simplify right side
    78.23x = 5,619.80
  5. Step 5: Solve for x
    x = 5,619.80/78.23
  6. Step 6: Final answer
    x = 71.84

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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.