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Finding the Fourth Proportional to 70.06, 96.70 and 40.56

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Solution

The fourth proportional to 70.06, 96.70 and 40.56 is: 55.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.06 : 96.70 = 40.56 : x
  2. Step 2: Convert to fraction form
    70.06/96.70 = 40.56/x
  3. Step 3: Cross multiply
    70.06x = 96.70 × 40.56
  4. Step 4: Simplify right side
    70.06x = 3,922.15
  5. Step 5: Solve for x
    x = 3,922.15/70.06
  6. Step 6: Final answer
    x = 55.98

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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.