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Finding the Fourth Proportional to 47.01, 70.43 and 31.76

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Solution

The fourth proportional to 47.01, 70.43 and 31.76 is: 47.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.01 : 70.43 = 31.76 : x
  2. Step 2: Convert to fraction form
    47.01/70.43 = 31.76/x
  3. Step 3: Cross multiply
    47.01x = 70.43 × 31.76
  4. Step 4: Simplify right side
    47.01x = 2,236.35
  5. Step 5: Solve for x
    x = 2,236.35/47.01
  6. Step 6: Final answer
    x = 47.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.