Home / 86,213.85-129,288.51-30,039.54

Finding the Fourth Proportional to 86,213.85, 129,288.51 and 30,039.54

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Solution

The fourth proportional to 86,213.85, 129,288.51 and 30,039.54 is: 45,048.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,213.85 : 129,288.51 = 30,039.54 : x
  2. Step 2: Convert to fraction form
    86,213.85/129,288.51 = 30,039.54/x
  3. Step 3: Cross multiply
    86,213.85x = 129,288.51 × 30,039.54
  4. Step 4: Simplify right side
    86,213.85x = 3,883,767,367.69
  5. Step 5: Solve for x
    x = 3,883,767,367.69/86,213.85
  6. Step 6: Final answer
    x = 45,048.07

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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.