Home / 100,856.38-139,180.68-55,533.46

Finding the Fourth Proportional to 100,856.38, 139,180.68 and 55,533.46

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Solution

The fourth proportional to 100,856.38, 139,180.68 and 55,533.46 is: 76,635.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,856.38 : 139,180.68 = 55,533.46 : x
  2. Step 2: Convert to fraction form
    100,856.38/139,180.68 = 55,533.46/x
  3. Step 3: Cross multiply
    100,856.38x = 139,180.68 × 55,533.46
  4. Step 4: Simplify right side
    100,856.38x = 7,729,184,725.55
  5. Step 5: Solve for x
    x = 7,729,184,725.55/100,856.38
  6. Step 6: Final answer
    x = 76,635.56

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1.5x scale

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.