Home / 81,212.04-121,818.10-43,789.74

Finding the Fourth Proportional to 81,212.04, 121,818.10 and 43,789.74

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Solution

The fourth proportional to 81,212.04, 121,818.10 and 43,789.74 is: 65,684.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,212.04 : 121,818.10 = 43,789.74 : x
  2. Step 2: Convert to fraction form
    81,212.04/121,818.10 = 43,789.74/x
  3. Step 3: Cross multiply
    81,212.04x = 121,818.10 × 43,789.74
  4. Step 4: Simplify right side
    81,212.04x = 5,334,382,926.29
  5. Step 5: Solve for x
    x = 5,334,382,926.29/81,212.04
  6. Step 6: Final answer
    x = 65,684.63

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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.