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Finding the Fourth Proportional to 66,351.10, 99,474.78 and 45,238.78

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Solution

The fourth proportional to 66,351.10, 99,474.78 and 45,238.78 is: 67,822.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,351.10 : 99,474.78 = 45,238.78 : x
  2. Step 2: Convert to fraction form
    66,351.10/99,474.78 = 45,238.78/x
  3. Step 3: Cross multiply
    66,351.10x = 99,474.78 × 45,238.78
  4. Step 4: Simplify right side
    66,351.10x = 4,500,117,687.97
  5. Step 5: Solve for x
    x = 4,500,117,687.97/66,351.10
  6. Step 6: Final answer
    x = 67,822.80

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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.