Home / 100,961.10-139,327.26-55,640.69

Finding the Fourth Proportional to 100,961.10, 139,327.26 and 55,640.69

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Solution

The fourth proportional to 100,961.10, 139,327.26 and 55,640.69 is: 76,784.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,961.10 : 139,327.26 = 55,640.69 : x
  2. Step 2: Convert to fraction form
    100,961.10/139,327.26 = 55,640.69/x
  3. Step 3: Cross multiply
    100,961.10x = 139,327.26 × 55,640.69
  4. Step 4: Simplify right side
    100,961.10x = 7,752,264,499.40
  5. Step 5: Solve for x
    x = 7,752,264,499.40/100,961.10
  6. Step 6: Final answer
    x = 76,784.67

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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.