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Finding the Fourth Proportional to 253,800.98, 380,687.43 and 85,303.87

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Solution

The fourth proportional to 253,800.98, 380,687.43 and 85,303.87 is: 127,951.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,800.98 : 380,687.43 = 85,303.87 : x
  2. Step 2: Convert to fraction form
    253,800.98/380,687.43 = 85,303.87/x
  3. Step 3: Cross multiply
    253,800.98x = 380,687.43 × 85,303.87
  4. Step 4: Simplify right side
    253,800.98x = 32,474,111,039.35
  5. Step 5: Solve for x
    x = 32,474,111,039.35/253,800.98
  6. Step 6: Final answer
    x = 127,951.09

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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.