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Finding the Fourth Proportional to 253,112, 379,689.87 and 66,123.50

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Solution

The fourth proportional to 253,112, 379,689.87 and 66,123.50 is: 99,190.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,112 : 379,689.87 = 66,123.50 : x
  2. Step 2: Convert to fraction form
    253,112/379,689.87 = 66,123.50/x
  3. Step 3: Cross multiply
    253,112x = 379,689.87 × 66,123.50
  4. Step 4: Simplify right side
    253,112x = 25,106,423,118.95
  5. Step 5: Solve for x
    x = 25,106,423,118.95/253,112
  6. Step 6: Final answer
    x = 99,190.96

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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.