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Finding the Fourth Proportional to 71.57, 98.73 and 42.41

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Solution

The fourth proportional to 71.57, 98.73 and 42.41 is: 58.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.57 : 98.73 = 42.41 : x
  2. Step 2: Convert to fraction form
    71.57/98.73 = 42.41/x
  3. Step 3: Cross multiply
    71.57x = 98.73 × 42.41
  4. Step 4: Simplify right side
    71.57x = 4,186.65
  5. Step 5: Solve for x
    x = 4,186.65/71.57
  6. Step 6: Final answer
    x = 58.50

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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.