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Finding the Fourth Proportional to 253,111.50, 379,689.12 and 66,123

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Solution

The fourth proportional to 253,111.50, 379,689.12 and 66,123 is: 99,190.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,111.50 : 379,689.12 = 66,123 : x
  2. Step 2: Convert to fraction form
    253,111.50/379,689.12 = 66,123/x
  3. Step 3: Cross multiply
    253,111.50x = 379,689.12 × 66,123
  4. Step 4: Simplify right side
    253,111.50x = 25,106,183,681.76
  5. Step 5: Solve for x
    x = 25,106,183,681.76/253,111.50
  6. Step 6: Final answer
    x = 99,190.21

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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.