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Finding the Fourth Proportional to 125.93, 189.07 and 80.15

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Solution

The fourth proportional to 125.93, 189.07 and 80.15 is: 120.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.93 : 189.07 = 80.15 : x
  2. Step 2: Convert to fraction form
    125.93/189.07 = 80.15/x
  3. Step 3: Cross multiply
    125.93x = 189.07 × 80.15
  4. Step 4: Simplify right side
    125.93x = 15,152.81
  5. Step 5: Solve for x
    x = 15,152.81/125.93
  6. Step 6: Final answer
    x = 120.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.