Home / 81,015.90-121,560.30-36,619.80

Finding the Fourth Proportional to 81,015.90, 121,560.30 and 36,619.80

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Solution

The fourth proportional to 81,015.90, 121,560.30 and 36,619.80 is: 54,946.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,015.90 : 121,560.30 = 36,619.80 : x
  2. Step 2: Convert to fraction form
    81,015.90/121,560.30 = 36,619.80/x
  3. Step 3: Cross multiply
    81,015.90x = 121,560.30 × 36,619.80
  4. Step 4: Simplify right side
    81,015.90x = 4,451,513,873.94
  5. Step 5: Solve for x
    x = 4,451,513,873.94/81,015.90
  6. Step 6: Final answer
    x = 54,946.18

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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.