Home / 81,000.07-121,517.38-31,079.75

Finding the Fourth Proportional to 81,000.07, 121,517.38 and 31,079.75

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Solution

The fourth proportional to 81,000.07, 121,517.38 and 31,079.75 is: 46,626.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000.07 : 121,517.38 = 31,079.75 : x
  2. Step 2: Convert to fraction form
    81,000.07/121,517.38 = 31,079.75/x
  3. Step 3: Cross multiply
    81,000.07x = 121,517.38 × 31,079.75
  4. Step 4: Simplify right side
    81,000.07x = 3,776,729,183.47
  5. Step 5: Solve for x
    x = 3,776,729,183.47/81,000.07
  6. Step 6: Final answer
    x = 46,626.25

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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.