Home / 81,838.92-122,670-39,629.64

Finding the Fourth Proportional to 81,838.92, 122,670 and 39,629.64

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Solution

The fourth proportional to 81,838.92, 122,670 and 39,629.64 is: 59,401.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,838.92 : 122,670 = 39,629.64 : x
  2. Step 2: Convert to fraction form
    81,838.92/122,670 = 39,629.64/x
  3. Step 3: Cross multiply
    81,838.92x = 122,670 × 39,629.64
  4. Step 4: Simplify right side
    81,838.92x = 4,861,367,938.80
  5. Step 5: Solve for x
    x = 4,861,367,938.80/81,838.92
  6. Step 6: Final answer
    x = 59,401.66

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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.