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Finding the Fourth Proportional to 116.32, 160.50 and 74.86

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Solution

The fourth proportional to 116.32, 160.50 and 74.86 is: 103.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.32 : 160.50 = 74.86 : x
  2. Step 2: Convert to fraction form
    116.32/160.50 = 74.86/x
  3. Step 3: Cross multiply
    116.32x = 160.50 × 74.86
  4. Step 4: Simplify right side
    116.32x = 12,015.03
  5. Step 5: Solve for x
    x = 12,015.03/116.32
  6. Step 6: Final answer
    x = 103.29

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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.