Home / 81,322.20-121,983.30-39,850.20

Finding the Fourth Proportional to 81,322.20, 121,983.30 and 39,850.20

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Solution

The fourth proportional to 81,322.20, 121,983.30 and 39,850.20 is: 59,775.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,322.20 : 121,983.30 = 39,850.20 : x
  2. Step 2: Convert to fraction form
    81,322.20/121,983.30 = 39,850.20/x
  3. Step 3: Cross multiply
    81,322.20x = 121,983.30 × 39,850.20
  4. Step 4: Simplify right side
    81,322.20x = 4,861,058,901.66
  5. Step 5: Solve for x
    x = 4,861,058,901.66/81,322.20
  6. Step 6: Final answer
    x = 59,775.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.