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Finding the Fourth Proportional to 108.99, 150.34 and 67.51

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Solution

The fourth proportional to 108.99, 150.34 and 67.51 is: 93.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.99 : 150.34 = 67.51 : x
  2. Step 2: Convert to fraction form
    108.99/150.34 = 67.51/x
  3. Step 3: Cross multiply
    108.99x = 150.34 × 67.51
  4. Step 4: Simplify right side
    108.99x = 10,149.12
  5. Step 5: Solve for x
    x = 10,149.12/108.99
  6. Step 6: Final answer
    x = 93.12

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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.