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Finding the Fourth Proportional to 160.37, 240.68 and 128.69

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Solution

The fourth proportional to 160.37, 240.68 and 128.69 is: 193.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.37 : 240.68 = 128.69 : x
  2. Step 2: Convert to fraction form
    160.37/240.68 = 128.69/x
  3. Step 3: Cross multiply
    160.37x = 240.68 × 128.69
  4. Step 4: Simplify right side
    160.37x = 30,973.11
  5. Step 5: Solve for x
    x = 30,973.11/160.37
  6. Step 6: Final answer
    x = 193.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.