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Finding the Fourth Proportional to 116.80, 160.64 and 111.04

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Solution

The fourth proportional to 116.80, 160.64 and 111.04 is: 152.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.80 : 160.64 = 111.04 : x
  2. Step 2: Convert to fraction form
    116.80/160.64 = 111.04/x
  3. Step 3: Cross multiply
    116.80x = 160.64 × 111.04
  4. Step 4: Simplify right side
    116.80x = 17,837.47
  5. Step 5: Solve for x
    x = 17,837.47/116.80
  6. Step 6: Final answer
    x = 152.72

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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.