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Finding the Fourth Proportional to 87,812.60, 131,762.10 and 66,745.40

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Solution

The fourth proportional to 87,812.60, 131,762.10 and 66,745.40 is: 100,150.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,812.60 : 131,762.10 = 66,745.40 : x
  2. Step 2: Convert to fraction form
    87,812.60/131,762.10 = 66,745.40/x
  3. Step 3: Cross multiply
    87,812.60x = 131,762.10 × 66,745.40
  4. Step 4: Simplify right side
    87,812.60x = 8,794,514,069.34
  5. Step 5: Solve for x
    x = 8,794,514,069.34/87,812.60
  6. Step 6: Final answer
    x = 100,150.94

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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.