Home / 81,206.74-121,834.71-36,821.57

Finding the Fourth Proportional to 81,206.74, 121,834.71 and 36,821.57

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Solution

The fourth proportional to 81,206.74, 121,834.71 and 36,821.57 is: 55,243.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,206.74 : 121,834.71 = 36,821.57 : x
  2. Step 2: Convert to fraction form
    81,206.74/121,834.71 = 36,821.57/x
  3. Step 3: Cross multiply
    81,206.74x = 121,834.71 × 36,821.57
  4. Step 4: Simplify right side
    81,206.74x = 4,486,145,302.69
  5. Step 5: Solve for x
    x = 4,486,145,302.69/81,206.74
  6. Step 6: Final answer
    x = 55,243.51

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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.