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Finding the Fourth Proportional to 128.03, 177.43 and 125.60

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Solution

The fourth proportional to 128.03, 177.43 and 125.60 is: 174.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128.03 : 177.43 = 125.60 : x
  2. Step 2: Convert to fraction form
    128.03/177.43 = 125.60/x
  3. Step 3: Cross multiply
    128.03x = 177.43 × 125.60
  4. Step 4: Simplify right side
    128.03x = 22,285.34
  5. Step 5: Solve for x
    x = 22,285.34/128.03
  6. Step 6: Final answer
    x = 174.06

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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.