Home / 81,245.40-121,940.10-47,923.80

Finding the Fourth Proportional to 81,245.40, 121,940.10 and 47,923.80

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Solution

The fourth proportional to 81,245.40, 121,940.10 and 47,923.80 is: 71,928.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,245.40 : 121,940.10 = 47,923.80 : x
  2. Step 2: Convert to fraction form
    81,245.40/121,940.10 = 47,923.80/x
  3. Step 3: Cross multiply
    81,245.40x = 121,940.10 × 47,923.80
  4. Step 4: Simplify right side
    81,245.40x = 5,843,832,964.38
  5. Step 5: Solve for x
    x = 5,843,832,964.38/81,245.40
  6. Step 6: Final answer
    x = 71,928.17

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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.