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Finding the Fourth Proportional to 87,606.40, 131,409.60 and 86,684.80

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Solution

The fourth proportional to 87,606.40, 131,409.60 and 86,684.80 is: 130,027.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,606.40 : 131,409.60 = 86,684.80 : x
  2. Step 2: Convert to fraction form
    87,606.40/131,409.60 = 86,684.80/x
  3. Step 3: Cross multiply
    87,606.40x = 131,409.60 × 86,684.80
  4. Step 4: Simplify right side
    87,606.40x = 11,391,214,894.08
  5. Step 5: Solve for x
    x = 11,391,214,894.08/87,606.40
  6. Step 6: Final answer
    x = 130,027.20

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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.