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Finding the Fourth Proportional to 199.61, 275.40 and 125.90

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Solution

The fourth proportional to 199.61, 275.40 and 125.90 is: 173.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.61 : 275.40 = 125.90 : x
  2. Step 2: Convert to fraction form
    199.61/275.40 = 125.90/x
  3. Step 3: Cross multiply
    199.61x = 275.40 × 125.90
  4. Step 4: Simplify right side
    199.61x = 34,671.48
  5. Step 5: Solve for x
    x = 34,671.48/199.61
  6. Step 6: Final answer
    x = 173.70

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.