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Finding the Fourth Proportional to 86,392.80, 129,625 and 41,391.36

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Solution

The fourth proportional to 86,392.80, 129,625 and 41,391.36 is: 62,104.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,392.80 : 129,625 = 41,391.36 : x
  2. Step 2: Convert to fraction form
    86,392.80/129,625 = 41,391.36/x
  3. Step 3: Cross multiply
    86,392.80x = 129,625 × 41,391.36
  4. Step 4: Simplify right side
    86,392.80x = 5,365,355,040
  5. Step 5: Solve for x
    x = 5,365,355,040/86,392.80
  6. Step 6: Final answer
    x = 62,104.19

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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.