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Finding the Fourth Proportional to 189.93, 262.17 and 127.77

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Solution

The fourth proportional to 189.93, 262.17 and 127.77 is: 176.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.93 : 262.17 = 127.77 : x
  2. Step 2: Convert to fraction form
    189.93/262.17 = 127.77/x
  3. Step 3: Cross multiply
    189.93x = 262.17 × 127.77
  4. Step 4: Simplify right side
    189.93x = 33,495.83
  5. Step 5: Solve for x
    x = 33,495.83/189.93
  6. Step 6: Final answer
    x = 176.36

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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.