Home / 81,218.37-121,812.71-36,834.42

Finding the Fourth Proportional to 81,218.37, 121,812.71 and 36,834.42

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Solution

The fourth proportional to 81,218.37, 121,812.71 and 36,834.42 is: 55,244.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,218.37 : 121,812.71 = 36,834.42 : x
  2. Step 2: Convert to fraction form
    81,218.37/121,812.71 = 36,834.42/x
  3. Step 3: Cross multiply
    81,218.37x = 121,812.71 × 36,834.42
  4. Step 4: Simplify right side
    81,218.37x = 4,486,900,337.31
  5. Step 5: Solve for x
    x = 4,486,900,337.31/81,218.37
  6. Step 6: Final answer
    x = 55,244.90

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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.