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Finding the Fourth Proportional to 145,213.09, 217,811.80 and 45,361.82

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Solution

The fourth proportional to 145,213.09, 217,811.80 and 45,361.82 is: 68,040.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,213.09 : 217,811.80 = 45,361.82 : x
  2. Step 2: Convert to fraction form
    145,213.09/217,811.80 = 45,361.82/x
  3. Step 3: Cross multiply
    145,213.09x = 217,811.80 × 45,361.82
  4. Step 4: Simplify right side
    145,213.09x = 9,880,339,665.48
  5. Step 5: Solve for x
    x = 9,880,339,665.48/145,213.09
  6. Step 6: Final answer
    x = 68,040.28

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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.