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Finding the Fourth Proportional to 127.55, 190.14 and 125.57

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Solution

The fourth proportional to 127.55, 190.14 and 125.57 is: 187.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.55 : 190.14 = 125.57 : x
  2. Step 2: Convert to fraction form
    127.55/190.14 = 125.57/x
  3. Step 3: Cross multiply
    127.55x = 190.14 × 125.57
  4. Step 4: Simplify right side
    127.55x = 23,875.88
  5. Step 5: Solve for x
    x = 23,875.88/127.55
  6. Step 6: Final answer
    x = 187.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.