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Finding the Fourth Proportional to 124.77, 173.40 and 123.30

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Solution

The fourth proportional to 124.77, 173.40 and 123.30 is: 171.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.77 : 173.40 = 123.30 : x
  2. Step 2: Convert to fraction form
    124.77/173.40 = 123.30/x
  3. Step 3: Cross multiply
    124.77x = 173.40 × 123.30
  4. Step 4: Simplify right side
    124.77x = 21,380.22
  5. Step 5: Solve for x
    x = 21,380.22/124.77
  6. Step 6: Final answer
    x = 171.36

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.