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Finding the Fourth Proportional to 108.70, 150.06 and 73.91

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Solution

The fourth proportional to 108.70, 150.06 and 73.91 is: 102.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.70 : 150.06 = 73.91 : x
  2. Step 2: Convert to fraction form
    108.70/150.06 = 73.91/x
  3. Step 3: Cross multiply
    108.70x = 150.06 × 73.91
  4. Step 4: Simplify right side
    108.70x = 11,090.93
  5. Step 5: Solve for x
    x = 11,090.93/108.70
  6. Step 6: Final answer
    x = 102.03

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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.