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Finding the Fourth Proportional to 253,113.50, 379,692.12 and 66,125

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Solution

The fourth proportional to 253,113.50, 379,692.12 and 66,125 is: 99,193.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,113.50 : 379,692.12 = 66,125 : x
  2. Step 2: Convert to fraction form
    253,113.50/379,692.12 = 66,125/x
  3. Step 3: Cross multiply
    253,113.50x = 379,692.12 × 66,125
  4. Step 4: Simplify right side
    253,113.50x = 25,107,141,435
  5. Step 5: Solve for x
    x = 25,107,141,435/253,113.50
  6. Step 6: Final answer
    x = 99,193.21

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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.