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Finding the Fourth Proportional to 58.80, 81.25 and 48.95

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Solution

The fourth proportional to 58.80, 81.25 and 48.95 is: 67.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.80 : 81.25 = 48.95 : x
  2. Step 2: Convert to fraction form
    58.80/81.25 = 48.95/x
  3. Step 3: Cross multiply
    58.80x = 81.25 × 48.95
  4. Step 4: Simplify right side
    58.80x = 3,976.96
  5. Step 5: Solve for x
    x = 3,976.96/58.80
  6. Step 6: Final answer
    x = 67.64

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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.