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Finding the Fourth Proportional to 58.68, 81 and 54.60

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Solution

The fourth proportional to 58.68, 81 and 54.60 is: 75.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.68 : 81 = 54.60 : x
  2. Step 2: Convert to fraction form
    58.68/81 = 54.60/x
  3. Step 3: Cross multiply
    58.68x = 81 × 54.60
  4. Step 4: Simplify right side
    58.68x = 4,422.60
  5. Step 5: Solve for x
    x = 4,422.60/58.68
  6. Step 6: Final answer
    x = 75.37

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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.