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Finding the Fourth Proportional to 143,676.90, 215,515.35 and 84,579.30

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Solution

The fourth proportional to 143,676.90, 215,515.35 and 84,579.30 is: 126,868.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,676.90 : 215,515.35 = 84,579.30 : x
  2. Step 2: Convert to fraction form
    143,676.90/215,515.35 = 84,579.30/x
  3. Step 3: Cross multiply
    143,676.90x = 215,515.35 × 84,579.30
  4. Step 4: Simplify right side
    143,676.90x = 18,228,137,442.26
  5. Step 5: Solve for x
    x = 18,228,137,442.26/143,676.90
  6. Step 6: Final answer
    x = 126,868.95

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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.