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Finding the Fourth Proportional to 104.51, 156.66 and 70.19

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Solution

The fourth proportional to 104.51, 156.66 and 70.19 is: 105.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.51 : 156.66 = 70.19 : x
  2. Step 2: Convert to fraction form
    104.51/156.66 = 70.19/x
  3. Step 3: Cross multiply
    104.51x = 156.66 × 70.19
  4. Step 4: Simplify right side
    104.51x = 10,995.97
  5. Step 5: Solve for x
    x = 10,995.97/104.51
  6. Step 6: Final answer
    x = 105.21

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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.