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Finding the Fourth Proportional to 253,503.68, 380,243.98 and 85,011.04

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Solution

The fourth proportional to 253,503.68, 380,243.98 and 85,011.04 is: 127,512.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,503.68 : 380,243.98 = 85,011.04 : x
  2. Step 2: Convert to fraction form
    253,503.68/380,243.98 = 85,011.04/x
  3. Step 3: Cross multiply
    253,503.68x = 380,243.98 × 85,011.04
  4. Step 4: Simplify right side
    253,503.68x = 32,324,936,193.54
  5. Step 5: Solve for x
    x = 32,324,936,193.54/253,503.68
  6. Step 6: Final answer
    x = 127,512.69

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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.