Home / 86,388.20-129,323.10-51,309.80

Finding the Fourth Proportional to 86,388.20, 129,323.10 and 51,309.80

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Solution

The fourth proportional to 86,388.20, 129,323.10 and 51,309.80 is: 76,810.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,388.20 : 129,323.10 = 51,309.80 : x
  2. Step 2: Convert to fraction form
    86,388.20/129,323.10 = 51,309.80/x
  3. Step 3: Cross multiply
    86,388.20x = 129,323.10 × 51,309.80
  4. Step 4: Simplify right side
    86,388.20x = 6,635,542,396.38
  5. Step 5: Solve for x
    x = 6,635,542,396.38/86,388.20
  6. Step 6: Final answer
    x = 76,810.75

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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.