Home / 100,856.14-139,180.34-55,533.20

Finding the Fourth Proportional to 100,856.14, 139,180.34 and 55,533.20

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Solution

The fourth proportional to 100,856.14, 139,180.34 and 55,533.20 is: 76,635.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,856.14 : 139,180.34 = 55,533.20 : x
  2. Step 2: Convert to fraction form
    100,856.14/139,180.34 = 55,533.20/x
  3. Step 3: Cross multiply
    100,856.14x = 139,180.34 × 55,533.20
  4. Step 4: Simplify right side
    100,856.14x = 7,729,129,100.22
  5. Step 5: Solve for x
    x = 7,729,129,100.22/100,856.14
  6. Step 6: Final answer
    x = 76,635.19

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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.