Home / 100,782.85-139,086.08-57,769.50

Finding the Fourth Proportional to 100,782.85, 139,086.08 and 57,769.50

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Solution

The fourth proportional to 100,782.85, 139,086.08 and 57,769.50 is: 79,725.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,782.85 : 139,086.08 = 57,769.50 : x
  2. Step 2: Convert to fraction form
    100,782.85/139,086.08 = 57,769.50/x
  3. Step 3: Cross multiply
    100,782.85x = 139,086.08 × 57,769.50
  4. Step 4: Simplify right side
    100,782.85x = 8,034,933,747.92
  5. Step 5: Solve for x
    x = 8,034,933,747.92/100,782.85
  6. Step 6: Final answer
    x = 79,725.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.