Home / 81,245.80-121,631.10-57,917.80

Finding the Fourth Proportional to 81,245.80, 121,631.10 and 57,917.80

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Solution

The fourth proportional to 81,245.80, 121,631.10 and 57,917.80 is: 86,707.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,245.80 : 121,631.10 = 57,917.80 : x
  2. Step 2: Convert to fraction form
    81,245.80/121,631.10 = 57,917.80/x
  3. Step 3: Cross multiply
    81,245.80x = 121,631.10 × 57,917.80
  4. Step 4: Simplify right side
    81,245.80x = 7,044,605,723.58
  5. Step 5: Solve for x
    x = 7,044,605,723.58/81,245.80
  6. Step 6: Final answer
    x = 86,707.32

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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.