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Finding the Fourth Proportional to 186.12, 256.77 and 127.89

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Solution

The fourth proportional to 186.12, 256.77 and 127.89 is: 176.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.12 : 256.77 = 127.89 : x
  2. Step 2: Convert to fraction form
    186.12/256.77 = 127.89/x
  3. Step 3: Cross multiply
    186.12x = 256.77 × 127.89
  4. Step 4: Simplify right side
    186.12x = 32,838.32
  5. Step 5: Solve for x
    x = 32,838.32/186.12
  6. Step 6: Final answer
    x = 176.44

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Why These Related Problems?

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