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Finding the Fourth Proportional to 66,427.26, 99,621.45 and 54,711.42

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Solution

The fourth proportional to 66,427.26, 99,621.45 and 54,711.42 is: 82,051.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,427.26 : 99,621.45 = 54,711.42 : x
  2. Step 2: Convert to fraction form
    66,427.26/99,621.45 = 54,711.42/x
  3. Step 3: Cross multiply
    66,427.26x = 99,621.45 × 54,711.42
  4. Step 4: Simplify right side
    66,427.26x = 5,450,430,991.96
  5. Step 5: Solve for x
    x = 5,450,430,991.96/66,427.26
  6. Step 6: Final answer
    x = 82,051.12

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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.