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Finding the Fourth Proportional to 71.47, 98.63 and 42.37

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Solution

The fourth proportional to 71.47, 98.63 and 42.37 is: 58.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.47 : 98.63 = 42.37 : x
  2. Step 2: Convert to fraction form
    71.47/98.63 = 42.37/x
  3. Step 3: Cross multiply
    71.47x = 98.63 × 42.37
  4. Step 4: Simplify right side
    71.47x = 4,178.95
  5. Step 5: Solve for x
    x = 4,178.95/71.47
  6. Step 6: Final answer
    x = 58.47

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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.