Home / 81,282.07-121,933.48-31,376.43

Finding the Fourth Proportional to 81,282.07, 121,933.48 and 31,376.43

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Solution

The fourth proportional to 81,282.07, 121,933.48 and 31,376.43 is: 47,068.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,282.07 : 121,933.48 = 31,376.43 : x
  2. Step 2: Convert to fraction form
    81,282.07/121,933.48 = 31,376.43/x
  3. Step 3: Cross multiply
    81,282.07x = 121,933.48 × 31,376.43
  4. Step 4: Simplify right side
    81,282.07x = 3,825,837,299.88
  5. Step 5: Solve for x
    x = 3,825,837,299.88/81,282.07
  6. Step 6: Final answer
    x = 47,068.65

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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.