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Finding the Fourth Proportional to 58.13, 80.25 and 38.75

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Solution

The fourth proportional to 58.13, 80.25 and 38.75 is: 53.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.13 : 80.25 = 38.75 : x
  2. Step 2: Convert to fraction form
    58.13/80.25 = 38.75/x
  3. Step 3: Cross multiply
    58.13x = 80.25 × 38.75
  4. Step 4: Simplify right side
    58.13x = 3,109.89
  5. Step 5: Solve for x
    x = 3,109.89/58.13
  6. Step 6: Final answer
    x = 53.50

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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.