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Finding the Fourth Proportional to 48.03, 66.21 and 42.22

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Solution

The fourth proportional to 48.03, 66.21 and 42.22 is: 58.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.03 : 66.21 = 42.22 : x
  2. Step 2: Convert to fraction form
    48.03/66.21 = 42.22/x
  3. Step 3: Cross multiply
    48.03x = 66.21 × 42.22
  4. Step 4: Simplify right side
    48.03x = 2,795.39
  5. Step 5: Solve for x
    x = 2,795.39/48.03
  6. Step 6: Final answer
    x = 58.20

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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.