Home / 100,080.08-138,119.88-55,382.48

Finding the Fourth Proportional to 100,080.08, 138,119.88 and 55,382.48

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Solution

The fourth proportional to 100,080.08, 138,119.88 and 55,382.48 is: 76,433.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,080.08 : 138,119.88 = 55,382.48 : x
  2. Step 2: Convert to fraction form
    100,080.08/138,119.88 = 55,382.48/x
  3. Step 3: Cross multiply
    100,080.08x = 138,119.88 × 55,382.48
  4. Step 4: Simplify right side
    100,080.08x = 7,649,421,491.70
  5. Step 5: Solve for x
    x = 7,649,421,491.70/100,080.08
  6. Step 6: Final answer
    x = 76,433.01

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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.