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Finding the Fourth Proportional to 125.22, 187.06 and 105.87

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Solution

The fourth proportional to 125.22, 187.06 and 105.87 is: 158.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.22 : 187.06 = 105.87 : x
  2. Step 2: Convert to fraction form
    125.22/187.06 = 105.87/x
  3. Step 3: Cross multiply
    125.22x = 187.06 × 105.87
  4. Step 4: Simplify right side
    125.22x = 19,803.78
  5. Step 5: Solve for x
    x = 19,803.78/125.22
  6. Step 6: Final answer
    x = 158.15

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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.