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Finding the Fourth Proportional to 104.22, 156.38 and 70.07

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Solution

The fourth proportional to 104.22, 156.38 and 70.07 is: 105.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.22 : 156.38 = 70.07 : x
  2. Step 2: Convert to fraction form
    104.22/156.38 = 70.07/x
  3. Step 3: Cross multiply
    104.22x = 156.38 × 70.07
  4. Step 4: Simplify right side
    104.22x = 10,956.41
  5. Step 5: Solve for x
    x = 10,956.41/104.22
  6. Step 6: Final answer
    x = 105.13

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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.