Home / 81,323.85-121,955.43-28,000.76

Finding the Fourth Proportional to 81,323.85, 121,955.43 and 28,000.76

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Solution

The fourth proportional to 81,323.85, 121,955.43 and 28,000.76 is: 41,990.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,323.85 : 121,955.43 = 28,000.76 : x
  2. Step 2: Convert to fraction form
    81,323.85/121,955.43 = 28,000.76/x
  3. Step 3: Cross multiply
    81,323.85x = 121,955.43 × 28,000.76
  4. Step 4: Simplify right side
    81,323.85x = 3,414,844,726.13
  5. Step 5: Solve for x
    x = 3,414,844,726.13/81,323.85
  6. Step 6: Final answer
    x = 41,990.69

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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.