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Finding the Fourth Proportional to 134.40, 185.04 and 125.40

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Solution

The fourth proportional to 134.40, 185.04 and 125.40 is: 172.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.40 : 185.04 = 125.40 : x
  2. Step 2: Convert to fraction form
    134.40/185.04 = 125.40/x
  3. Step 3: Cross multiply
    134.40x = 185.04 × 125.40
  4. Step 4: Simplify right side
    134.40x = 23,204.02
  5. Step 5: Solve for x
    x = 23,204.02/134.40
  6. Step 6: Final answer
    x = 172.65

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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.