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Finding the Fourth Proportional to 160.64, 239.92 and 139.04

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Solution

The fourth proportional to 160.64, 239.92 and 139.04 is: 207.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.64 : 239.92 = 139.04 : x
  2. Step 2: Convert to fraction form
    160.64/239.92 = 139.04/x
  3. Step 3: Cross multiply
    160.64x = 239.92 × 139.04
  4. Step 4: Simplify right side
    160.64x = 33,358.48
  5. Step 5: Solve for x
    x = 33,358.48/160.64
  6. Step 6: Final answer
    x = 207.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.