Home / 81,210.12-121,800.30-36,826.20

Finding the Fourth Proportional to 81,210.12, 121,800.30 and 36,826.20

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Solution

The fourth proportional to 81,210.12, 121,800.30 and 36,826.20 is: 55,232.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,210.12 : 121,800.30 = 36,826.20 : x
  2. Step 2: Convert to fraction form
    81,210.12/121,800.30 = 36,826.20/x
  3. Step 3: Cross multiply
    81,210.12x = 121,800.30 × 36,826.20
  4. Step 4: Simplify right side
    81,210.12x = 4,485,442,207.86
  5. Step 5: Solve for x
    x = 4,485,442,207.86/81,210.12
  6. Step 6: Final answer
    x = 55,232.55

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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.