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Finding the Fourth Proportional to 54.68, 75.26 and 45

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Solution

The fourth proportional to 54.68, 75.26 and 45 is: 61.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.68 : 75.26 = 45 : x
  2. Step 2: Convert to fraction form
    54.68/75.26 = 45/x
  3. Step 3: Cross multiply
    54.68x = 75.26 × 45
  4. Step 4: Simplify right side
    54.68x = 3,386.70
  5. Step 5: Solve for x
    x = 3,386.70/54.68
  6. Step 6: Final answer
    x = 61.94

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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.