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Finding the Fourth Proportional to 70.43, 97.09 and 45.85

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Solution

The fourth proportional to 70.43, 97.09 and 45.85 is: 63.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.43 : 97.09 = 45.85 : x
  2. Step 2: Convert to fraction form
    70.43/97.09 = 45.85/x
  3. Step 3: Cross multiply
    70.43x = 97.09 × 45.85
  4. Step 4: Simplify right side
    70.43x = 4,451.58
  5. Step 5: Solve for x
    x = 4,451.58/70.43
  6. Step 6: Final answer
    x = 63.21

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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.