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Finding the Fourth Proportional to 48.12, 66.30 and 48.06

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Solution

The fourth proportional to 48.12, 66.30 and 48.06 is: 66.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.12 : 66.30 = 48.06 : x
  2. Step 2: Convert to fraction form
    48.12/66.30 = 48.06/x
  3. Step 3: Cross multiply
    48.12x = 66.30 × 48.06
  4. Step 4: Simplify right side
    48.12x = 3,186.38
  5. Step 5: Solve for x
    x = 3,186.38/48.12
  6. Step 6: Final answer
    x = 66.22

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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.