Home / 81,285.68-121,842.74-43,835.56

Finding the Fourth Proportional to 81,285.68, 121,842.74 and 43,835.56

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Solution

The fourth proportional to 81,285.68, 121,842.74 and 43,835.56 is: 65,707.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,285.68 : 121,842.74 = 43,835.56 : x
  2. Step 2: Convert to fraction form
    81,285.68/121,842.74 = 43,835.56/x
  3. Step 3: Cross multiply
    81,285.68x = 121,842.74 × 43,835.56
  4. Step 4: Simplify right side
    81,285.68x = 5,341,044,739.83
  5. Step 5: Solve for x
    x = 5,341,044,739.83/81,285.68
  6. Step 6: Final answer
    x = 65,707.08

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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.