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Finding the Fourth Proportional to 127.77, 177.06 and 120.08

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Solution

The fourth proportional to 127.77, 177.06 and 120.08 is: 166.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.77 : 177.06 = 120.08 : x
  2. Step 2: Convert to fraction form
    127.77/177.06 = 120.08/x
  3. Step 3: Cross multiply
    127.77x = 177.06 × 120.08
  4. Step 4: Simplify right side
    127.77x = 21,260.48
  5. Step 5: Solve for x
    x = 21,260.48/127.77
  6. Step 6: Final answer
    x = 166.40

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.