Home / 81,218.12-121,812.28-36,834.20

Finding the Fourth Proportional to 81,218.12, 121,812.28 and 36,834.20

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Solution

The fourth proportional to 81,218.12, 121,812.28 and 36,834.20 is: 55,244.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,218.12 : 121,812.28 = 36,834.20 : x
  2. Step 2: Convert to fraction form
    81,218.12/121,812.28 = 36,834.20/x
  3. Step 3: Cross multiply
    81,218.12x = 121,812.28 × 36,834.20
  4. Step 4: Simplify right side
    81,218.12x = 4,486,857,883.98
  5. Step 5: Solve for x
    x = 4,486,857,883.98/81,218.12
  6. Step 6: Final answer
    x = 55,244.54

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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.