Home / 121,865.61-182,724.60-79,694.78

Finding the Fourth Proportional to 121,865.61, 182,724.60 and 79,694.78

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Solution

The fourth proportional to 121,865.61, 182,724.60 and 79,694.78 is: 119,493.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,865.61 : 182,724.60 = 79,694.78 : x
  2. Step 2: Convert to fraction form
    121,865.61/182,724.60 = 79,694.78/x
  3. Step 3: Cross multiply
    121,865.61x = 182,724.60 × 79,694.78
  4. Step 4: Simplify right side
    121,865.61x = 14,562,196,797.59
  5. Step 5: Solve for x
    x = 14,562,196,797.59/121,865.61
  6. Step 6: Final answer
    x = 119,493.90

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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.