Home / 100,855.12-139,180.08-55,533.28

Finding the Fourth Proportional to 100,855.12, 139,180.08 and 55,533.28

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Solution

The fourth proportional to 100,855.12, 139,180.08 and 55,533.28 is: 76,635.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,855.12 : 139,180.08 = 55,533.28 : x
  2. Step 2: Convert to fraction form
    100,855.12/139,180.08 = 55,533.28/x
  3. Step 3: Cross multiply
    100,855.12x = 139,180.08 × 55,533.28
  4. Step 4: Simplify right side
    100,855.12x = 7,729,126,353.06
  5. Step 5: Solve for x
    x = 7,729,126,353.06/100,855.12
  6. Step 6: Final answer
    x = 76,635.93

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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.