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Finding the Fourth Proportional to 116.60, 161.04 and 100.16

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Solution

The fourth proportional to 116.60, 161.04 and 100.16 is: 138.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.60 : 161.04 = 100.16 : x
  2. Step 2: Convert to fraction form
    116.60/161.04 = 100.16/x
  3. Step 3: Cross multiply
    116.60x = 161.04 × 100.16
  4. Step 4: Simplify right side
    116.60x = 16,129.77
  5. Step 5: Solve for x
    x = 16,129.77/116.60
  6. Step 6: Final answer
    x = 138.33

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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.