Home / 100,485.08-138,660.65-55,163.00

Finding the Fourth Proportional to 100,485.08, 138,660.65 and 55,163.00

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Solution

The fourth proportional to 100,485.08, 138,660.65 and 55,163.00 is: 76,120.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,485.08 : 138,660.65 = 55,163.00 : x
  2. Step 2: Convert to fraction form
    100,485.08/138,660.65 = 55,163.00/x
  3. Step 3: Cross multiply
    100,485.08x = 138,660.65 × 55,163.00
  4. Step 4: Simplify right side
    100,485.08x = 7,648,936,742.65
  5. Step 5: Solve for x
    x = 7,648,936,742.65/100,485.08
  6. Step 6: Final answer
    x = 76,120.13

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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.