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Finding the Fourth Proportional to 58.49, 87.31 and 54.48

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Solution

The fourth proportional to 58.49, 87.31 and 54.48 is: 81.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.49 : 87.31 = 54.48 : x
  2. Step 2: Convert to fraction form
    58.49/87.31 = 54.48/x
  3. Step 3: Cross multiply
    58.49x = 87.31 × 54.48
  4. Step 4: Simplify right side
    58.49x = 4,756.65
  5. Step 5: Solve for x
    x = 4,756.65/58.49
  6. Step 6: Final answer
    x = 81.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.