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Finding the Fourth Proportional to 108.86, 150.21 and 69.53

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Solution

The fourth proportional to 108.86, 150.21 and 69.53 is: 95.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.86 : 150.21 = 69.53 : x
  2. Step 2: Convert to fraction form
    108.86/150.21 = 69.53/x
  3. Step 3: Cross multiply
    108.86x = 150.21 × 69.53
  4. Step 4: Simplify right side
    108.86x = 10,444.10
  5. Step 5: Solve for x
    x = 10,444.10/108.86
  6. Step 6: Final answer
    x = 95.94

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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.