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Finding the Fourth Proportional to 95,765.20, 143,647.80 and 86,579.80

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Solution

The fourth proportional to 95,765.20, 143,647.80 and 86,579.80 is: 129,869.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    95,765.20 : 143,647.80 = 86,579.80 : x
  2. Step 2: Convert to fraction form
    95,765.20/143,647.80 = 86,579.80/x
  3. Step 3: Cross multiply
    95,765.20x = 143,647.80 × 86,579.80
  4. Step 4: Simplify right side
    95,765.20x = 12,436,997,794.44
  5. Step 5: Solve for x
    x = 12,436,997,794.44/95,765.20
  6. Step 6: Final answer
    x = 129,869.70

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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.