Home / 81,990.41-122,958.10-31,377.63

Finding the Fourth Proportional to 81,990.41, 122,958.10 and 31,377.63

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Solution

The fourth proportional to 81,990.41, 122,958.10 and 31,377.63 is: 47,055.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,990.41 : 122,958.10 = 31,377.63 : x
  2. Step 2: Convert to fraction form
    81,990.41/122,958.10 = 31,377.63/x
  3. Step 3: Cross multiply
    81,990.41x = 122,958.10 × 31,377.63
  4. Step 4: Simplify right side
    81,990.41x = 3,858,133,806.53
  5. Step 5: Solve for x
    x = 3,858,133,806.53/81,990.41
  6. Step 6: Final answer
    x = 47,055.92

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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.