Home / 81,403.04-122,118.42-28,080.56

Finding the Fourth Proportional to 81,403.04, 122,118.42 and 28,080.56

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Solution

The fourth proportional to 81,403.04, 122,118.42 and 28,080.56 is: 42,125.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,403.04 : 122,118.42 = 28,080.56 : x
  2. Step 2: Convert to fraction form
    81,403.04/122,118.42 = 28,080.56/x
  3. Step 3: Cross multiply
    81,403.04x = 122,118.42 × 28,080.56
  4. Step 4: Simplify right side
    81,403.04x = 3,429,153,619.92
  5. Step 5: Solve for x
    x = 3,429,153,619.92/81,403.04
  6. Step 6: Final answer
    x = 42,125.62

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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.