Home / 81,344.32-121,994.61-28,739.68

Finding the Fourth Proportional to 81,344.32, 121,994.61 and 28,739.68

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Solution

The fourth proportional to 81,344.32, 121,994.61 and 28,739.68 is: 43,101.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,344.32 : 121,994.61 = 28,739.68 : x
  2. Step 2: Convert to fraction form
    81,344.32/121,994.61 = 28,739.68/x
  3. Step 3: Cross multiply
    81,344.32x = 121,994.61 × 28,739.68
  4. Step 4: Simplify right side
    81,344.32x = 3,506,086,053.12
  5. Step 5: Solve for x
    x = 3,506,086,053.12/81,344.32
  6. Step 6: Final answer
    x = 43,101.79

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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.