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Finding the Fourth Proportional to 47.35, 71.30 and 43.57

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Solution

The fourth proportional to 47.35, 71.30 and 43.57 is: 65.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.35 : 71.30 = 43.57 : x
  2. Step 2: Convert to fraction form
    47.35/71.30 = 43.57/x
  3. Step 3: Cross multiply
    47.35x = 71.30 × 43.57
  4. Step 4: Simplify right side
    47.35x = 3,106.54
  5. Step 5: Solve for x
    x = 3,106.54/47.35
  6. Step 6: Final answer
    x = 65.61

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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.