Home / 81,216.84-121,846.02-31,283.54

Finding the Fourth Proportional to 81,216.84, 121,846.02 and 31,283.54

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Solution

The fourth proportional to 81,216.84, 121,846.02 and 31,283.54 is: 46,933.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,216.84 : 121,846.02 = 31,283.54 : x
  2. Step 2: Convert to fraction form
    81,216.84/121,846.02 = 31,283.54/x
  3. Step 3: Cross multiply
    81,216.84x = 121,846.02 × 31,283.54
  4. Step 4: Simplify right side
    81,216.84x = 3,811,774,231.28
  5. Step 5: Solve for x
    x = 3,811,774,231.28/81,216.84
  6. Step 6: Final answer
    x = 46,933.30

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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.