Home / 100,321.28-138,353.69-66,364.46

Finding the Fourth Proportional to 100,321.28, 138,353.69 and 66,364.46

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Solution

The fourth proportional to 100,321.28, 138,353.69 and 66,364.46 is: 91,523.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,321.28 : 138,353.69 = 66,364.46 : x
  2. Step 2: Convert to fraction form
    100,321.28/138,353.69 = 66,364.46/x
  3. Step 3: Cross multiply
    100,321.28x = 138,353.69 × 66,364.46
  4. Step 4: Simplify right side
    100,321.28x = 9,181,767,400.00
  5. Step 5: Solve for x
    x = 9,181,767,400.00/100,321.28
  6. Step 6: Final answer
    x = 91,523.63

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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.