Home / 81,040.37-121,521.65-38,310.21

Finding the Fourth Proportional to 81,040.37, 121,521.65 and 38,310.21

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Solution

The fourth proportional to 81,040.37, 121,521.65 and 38,310.21 is: 57,446.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,040.37 : 121,521.65 = 38,310.21 : x
  2. Step 2: Convert to fraction form
    81,040.37/121,521.65 = 38,310.21/x
  3. Step 3: Cross multiply
    81,040.37x = 121,521.65 × 38,310.21
  4. Step 4: Simplify right side
    81,040.37x = 4,655,519,739.50
  5. Step 5: Solve for x
    x = 4,655,519,739.50/81,040.37
  6. Step 6: Final answer
    x = 57,446.92

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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.