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Finding the Fourth Proportional to 72.00, 107.90 and 26.30

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Solution

The fourth proportional to 72.00, 107.90 and 26.30 is: 39.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.00 : 107.90 = 26.30 : x
  2. Step 2: Convert to fraction form
    72.00/107.90 = 26.30/x
  3. Step 3: Cross multiply
    72.00x = 107.90 × 26.30
  4. Step 4: Simplify right side
    72.00x = 2,838.01
  5. Step 5: Solve for x
    x = 2,838.01/72.00
  6. Step 6: Final answer
    x = 39.42

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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.