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Finding the Fourth Proportional to 251,279.40, 376,919.10 and 111,311.40

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Solution

The fourth proportional to 251,279.40, 376,919.10 and 111,311.40 is: 166,967.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,279.40 : 376,919.10 = 111,311.40 : x
  2. Step 2: Convert to fraction form
    251,279.40/376,919.10 = 111,311.40/x
  3. Step 3: Cross multiply
    251,279.40x = 376,919.10 × 111,311.40
  4. Step 4: Simplify right side
    251,279.40x = 41,955,392,707.74
  5. Step 5: Solve for x
    x = 41,955,392,707.74/251,279.40
  6. Step 6: Final answer
    x = 166,967.10

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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.