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Finding the Fourth Proportional to 70.07, 104.57 and 52.86

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Solution

The fourth proportional to 70.07, 104.57 and 52.86 is: 78.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.07 : 104.57 = 52.86 : x
  2. Step 2: Convert to fraction form
    70.07/104.57 = 52.86/x
  3. Step 3: Cross multiply
    70.07x = 104.57 × 52.86
  4. Step 4: Simplify right side
    70.07x = 5,527.70
  5. Step 5: Solve for x
    x = 5,527.70/70.07
  6. Step 6: Final answer
    x = 78.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.