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Finding the Fourth Proportional to 87,409.80, 130,920.30 and 75,745.80

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Solution

The fourth proportional to 87,409.80, 130,920.30 and 75,745.80 is: 113,450.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,409.80 : 130,920.30 = 75,745.80 : x
  2. Step 2: Convert to fraction form
    87,409.80/130,920.30 = 75,745.80/x
  3. Step 3: Cross multiply
    87,409.80x = 130,920.30 × 75,745.80
  4. Step 4: Simplify right side
    87,409.80x = 9,916,662,859.74
  5. Step 5: Solve for x
    x = 9,916,662,859.74/87,409.80
  6. Step 6: Final answer
    x = 113,450.24

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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.