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Finding the Fourth Proportional to 248,105.70, 372,158.55 and 129,813.30

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Solution

The fourth proportional to 248,105.70, 372,158.55 and 129,813.30 is: 194,719.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,105.70 : 372,158.55 = 129,813.30 : x
  2. Step 2: Convert to fraction form
    248,105.70/372,158.55 = 129,813.30/x
  3. Step 3: Cross multiply
    248,105.70x = 372,158.55 × 129,813.30
  4. Step 4: Simplify right side
    248,105.70x = 48,311,129,498.72
  5. Step 5: Solve for x
    x = 48,311,129,498.72/248,105.70
  6. Step 6: Final answer
    x = 194,719.95

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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.