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Finding the Fourth Proportional to 125.30, 186.78 and 118.46

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Solution

The fourth proportional to 125.30, 186.78 and 118.46 is: 176.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.30 : 186.78 = 118.46 : x
  2. Step 2: Convert to fraction form
    125.30/186.78 = 118.46/x
  3. Step 3: Cross multiply
    125.30x = 186.78 × 118.46
  4. Step 4: Simplify right side
    125.30x = 22,124.43
  5. Step 5: Solve for x
    x = 22,124.43/125.30
  6. Step 6: Final answer
    x = 176.58

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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.