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Finding the Fourth Proportional to 253,353.36, 379,986.30 and 75,812.70

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Solution

The fourth proportional to 253,353.36, 379,986.30 and 75,812.70 is: 113,705.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,353.36 : 379,986.30 = 75,812.70 : x
  2. Step 2: Convert to fraction form
    253,353.36/379,986.30 = 75,812.70/x
  3. Step 3: Cross multiply
    253,353.36x = 379,986.30 × 75,812.70
  4. Step 4: Simplify right side
    253,353.36x = 28,807,787,366.01
  5. Step 5: Solve for x
    x = 28,807,787,366.01/253,353.36
  6. Step 6: Final answer
    x = 113,705.96

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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.