Home / 81,254.39-121,889.70-30,640.61

Finding the Fourth Proportional to 81,254.39, 121,889.70 and 30,640.61

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Solution

The fourth proportional to 81,254.39, 121,889.70 and 30,640.61 is: 45,963.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,254.39 : 121,889.70 = 30,640.61 : x
  2. Step 2: Convert to fraction form
    81,254.39/121,889.70 = 30,640.61/x
  3. Step 3: Cross multiply
    81,254.39x = 121,889.70 × 30,640.61
  4. Step 4: Simplify right side
    81,254.39x = 3,734,774,760.72
  5. Step 5: Solve for x
    x = 3,734,774,760.72/81,254.39
  6. Step 6: Final answer
    x = 45,963.98

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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.