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Finding the Fourth Proportional to 108,867, 163,183.86 and 45,671.21

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Solution

The fourth proportional to 108,867, 163,183.86 and 45,671.21 is: 68,457.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,867 : 163,183.86 = 45,671.21 : x
  2. Step 2: Convert to fraction form
    108,867/163,183.86 = 45,671.21/x
  3. Step 3: Cross multiply
    108,867x = 163,183.86 × 45,671.21
  4. Step 4: Simplify right side
    108,867x = 7,452,803,522.75
  5. Step 5: Solve for x
    x = 7,452,803,522.75/108,867
  6. Step 6: Final answer
    x = 68,457.88

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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.