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Finding the Fourth Proportional to 48.89, 73.31 and 20.00

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Solution

The fourth proportional to 48.89, 73.31 and 20.00 is: 29.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.89 : 73.31 = 20.00 : x
  2. Step 2: Convert to fraction form
    48.89/73.31 = 20.00/x
  3. Step 3: Cross multiply
    48.89x = 73.31 × 20.00
  4. Step 4: Simplify right side
    48.89x = 1,465.87
  5. Step 5: Solve for x
    x = 1,465.87/48.89
  6. Step 6: Final answer
    x = 29.98

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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.