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Finding the Fourth Proportional to 312,836.34, 469,272.78 and 120,711.78

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Solution

The fourth proportional to 312,836.34, 469,272.78 and 120,711.78 is: 181,074.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,836.34 : 469,272.78 = 120,711.78 : x
  2. Step 2: Convert to fraction form
    312,836.34/469,272.78 = 120,711.78/x
  3. Step 3: Cross multiply
    312,836.34x = 469,272.78 × 120,711.78
  4. Step 4: Simplify right side
    312,836.34x = 56,646,752,579.35
  5. Step 5: Solve for x
    x = 56,646,752,579.35/312,836.34
  6. Step 6: Final answer
    x = 181,074.72

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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.