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Finding the Fourth Proportional to 253,102.20, 379,657.80 and 75,611.40

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Solution

The fourth proportional to 253,102.20, 379,657.80 and 75,611.40 is: 113,418.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,102.20 : 379,657.80 = 75,611.40 : x
  2. Step 2: Convert to fraction form
    253,102.20/379,657.80 = 75,611.40/x
  3. Step 3: Cross multiply
    253,102.20x = 379,657.80 × 75,611.40
  4. Step 4: Simplify right side
    253,102.20x = 28,706,457,778.92
  5. Step 5: Solve for x
    x = 28,706,457,778.92/253,102.20
  6. Step 6: Final answer
    x = 113,418.44

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1.5x scale

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.