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Finding the Fourth Proportional to 160.48, 221.36 and 127.68

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Solution

The fourth proportional to 160.48, 221.36 and 127.68 is: 176.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.48 : 221.36 = 127.68 : x
  2. Step 2: Convert to fraction form
    160.48/221.36 = 127.68/x
  3. Step 3: Cross multiply
    160.48x = 221.36 × 127.68
  4. Step 4: Simplify right side
    160.48x = 28,263.24
  5. Step 5: Solve for x
    x = 28,263.24/160.48
  6. Step 6: Final answer
    x = 176.12

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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.