Home / 100,584.12-138,867.04-66,621.72

Finding the Fourth Proportional to 100,584.12, 138,867.04 and 66,621.72

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Solution

The fourth proportional to 100,584.12, 138,867.04 and 66,621.72 is: 91,978.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,584.12 : 138,867.04 = 66,621.72 : x
  2. Step 2: Convert to fraction form
    100,584.12/138,867.04 = 66,621.72/x
  3. Step 3: Cross multiply
    100,584.12x = 138,867.04 × 66,621.72
  4. Step 4: Simplify right side
    100,584.12x = 9,251,560,347.92
  5. Step 5: Solve for x
    x = 9,251,560,347.92/100,584.12
  6. Step 6: Final answer
    x = 91,978.34

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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.