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Finding the Fourth Proportional to 66,166.78, 99,239.75 and 54,993.86

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Solution

The fourth proportional to 66,166.78, 99,239.75 and 54,993.86 is: 82,482.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,166.78 : 99,239.75 = 54,993.86 : x
  2. Step 2: Convert to fraction form
    66,166.78/99,239.75 = 54,993.86/x
  3. Step 3: Cross multiply
    66,166.78x = 99,239.75 × 54,993.86
  4. Step 4: Simplify right side
    66,166.78x = 5,457,576,917.94
  5. Step 5: Solve for x
    x = 5,457,576,917.94/66,166.78
  6. Step 6: Final answer
    x = 82,482.13

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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.