Home / 81,239.07-121,823.74-27,936.42

Finding the Fourth Proportional to 81,239.07, 121,823.74 and 27,936.42

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Solution

The fourth proportional to 81,239.07, 121,823.74 and 27,936.42 is: 41,892.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,239.07 : 121,823.74 = 27,936.42 : x
  2. Step 2: Convert to fraction form
    81,239.07/121,823.74 = 27,936.42/x
  3. Step 3: Cross multiply
    81,239.07x = 121,823.74 × 27,936.42
  4. Step 4: Simplify right side
    81,239.07x = 3,403,319,166.61
  5. Step 5: Solve for x
    x = 3,403,319,166.61/81,239.07
  6. Step 6: Final answer
    x = 41,892.64

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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.