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Finding the Fourth Proportional to 47.57, 71.64 and 43.41

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Solution

The fourth proportional to 47.57, 71.64 and 43.41 is: 65.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.57 : 71.64 = 43.41 : x
  2. Step 2: Convert to fraction form
    47.57/71.64 = 43.41/x
  3. Step 3: Cross multiply
    47.57x = 71.64 × 43.41
  4. Step 4: Simplify right side
    47.57x = 3,109.89
  5. Step 5: Solve for x
    x = 3,109.89/47.57
  6. Step 6: Final answer
    x = 65.38

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.