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Finding the Fourth Proportional to 48.99, 73.59 and 45.09

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Solution

The fourth proportional to 48.99, 73.59 and 45.09 is: 67.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.99 : 73.59 = 45.09 : x
  2. Step 2: Convert to fraction form
    48.99/73.59 = 45.09/x
  3. Step 3: Cross multiply
    48.99x = 73.59 × 45.09
  4. Step 4: Simplify right side
    48.99x = 3,318.17
  5. Step 5: Solve for x
    x = 3,318.17/48.99
  6. Step 6: Final answer
    x = 67.73

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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.