Home / 129,620.35-178,869.87-72,265.97

Finding the Fourth Proportional to 129,620.35, 178,869.87 and 72,265.97

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Solution

The fourth proportional to 129,620.35, 178,869.87 and 72,265.97 is: 99,723.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,620.35 : 178,869.87 = 72,265.97 : x
  2. Step 2: Convert to fraction form
    129,620.35/178,869.87 = 72,265.97/x
  3. Step 3: Cross multiply
    129,620.35x = 178,869.87 × 72,265.97
  4. Step 4: Simplify right side
    129,620.35x = 12,926,205,106.50
  5. Step 5: Solve for x
    x = 12,926,205,106.50/129,620.35
  6. Step 6: Final answer
    x = 99,723.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.