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Finding the Fourth Proportional to 74.07, 101.55 and 72.03

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Solution

The fourth proportional to 74.07, 101.55 and 72.03 is: 98.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.07 : 101.55 = 72.03 : x
  2. Step 2: Convert to fraction form
    74.07/101.55 = 72.03/x
  3. Step 3: Cross multiply
    74.07x = 101.55 × 72.03
  4. Step 4: Simplify right side
    74.07x = 7,314.65
  5. Step 5: Solve for x
    x = 7,314.65/74.07
  6. Step 6: Final answer
    x = 98.75

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.