Home / 100,172.28-138,247.02-55,460.28

Finding the Fourth Proportional to 100,172.28, 138,247.02 and 55,460.28

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Solution

The fourth proportional to 100,172.28, 138,247.02 and 55,460.28 is: 76,540.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,172.28 : 138,247.02 = 55,460.28 : x
  2. Step 2: Convert to fraction form
    100,172.28/138,247.02 = 55,460.28/x
  3. Step 3: Cross multiply
    100,172.28x = 138,247.02 × 55,460.28
  4. Step 4: Simplify right side
    100,172.28x = 7,667,218,438.37
  5. Step 5: Solve for x
    x = 7,667,218,438.37/100,172.28
  6. Step 6: Final answer
    x = 76,540.32

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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.