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Finding the Fourth Proportional to 253,113.70, 379,674.60 and 66,125.20

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Solution

The fourth proportional to 253,113.70, 379,674.60 and 66,125.20 is: 99,188.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,113.70 : 379,674.60 = 66,125.20 : x
  2. Step 2: Convert to fraction form
    253,113.70/379,674.60 = 66,125.20/x
  3. Step 3: Cross multiply
    253,113.70x = 379,674.60 × 66,125.20
  4. Step 4: Simplify right side
    253,113.70x = 25,106,058,859.92
  5. Step 5: Solve for x
    x = 25,106,058,859.92/253,113.70
  6. Step 6: Final answer
    x = 99,188.86

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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.