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Finding the Fourth Proportional to 253,103.20, 379,659.30 and 75,612.40

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Solution

The fourth proportional to 253,103.20, 379,659.30 and 75,612.40 is: 113,419.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,103.20 : 379,659.30 = 75,612.40 : x
  2. Step 2: Convert to fraction form
    253,103.20/379,659.30 = 75,612.40/x
  3. Step 3: Cross multiply
    253,103.20x = 379,659.30 × 75,612.40
  4. Step 4: Simplify right side
    253,103.20x = 28,706,950,855.32
  5. Step 5: Solve for x
    x = 28,706,950,855.32/253,103.20
  6. Step 6: Final answer
    x = 113,419.94

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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.