Home / 81,226.07-121,543.86-67,054.31

Finding the Fourth Proportional to 81,226.07, 121,543.86 and 67,054.31

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Solution

The fourth proportional to 81,226.07, 121,543.86 and 67,054.31 is: 100,337.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,226.07 : 121,543.86 = 67,054.31 : x
  2. Step 2: Convert to fraction form
    81,226.07/121,543.86 = 67,054.31/x
  3. Step 3: Cross multiply
    81,226.07x = 121,543.86 × 67,054.31
  4. Step 4: Simplify right side
    81,226.07x = 8,150,039,667.04
  5. Step 5: Solve for x
    x = 8,150,039,667.04/81,226.07
  6. Step 6: Final answer
    x = 100,337.73

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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.