Home / 81,257.12-121,873.32-31,360.88

Finding the Fourth Proportional to 81,257.12, 121,873.32 and 31,360.88

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Solution

The fourth proportional to 81,257.12, 121,873.32 and 31,360.88 is: 47,036.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,257.12 : 121,873.32 = 31,360.88 : x
  2. Step 2: Convert to fraction form
    81,257.12/121,873.32 = 31,360.88/x
  3. Step 3: Cross multiply
    81,257.12x = 121,873.32 × 31,360.88
  4. Step 4: Simplify right side
    81,257.12x = 3,822,054,563.72
  5. Step 5: Solve for x
    x = 3,822,054,563.72/81,257.12
  6. Step 6: Final answer
    x = 47,036.55

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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.