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Finding the Fourth Proportional to 104,729.78, 144,537.80 and 61,722.65

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Solution

The fourth proportional to 104,729.78, 144,537.80 and 61,722.65 is: 85,183.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,729.78 : 144,537.80 = 61,722.65 : x
  2. Step 2: Convert to fraction form
    104,729.78/144,537.80 = 61,722.65/x
  3. Step 3: Cross multiply
    104,729.78x = 144,537.80 × 61,722.65
  4. Step 4: Simplify right side
    104,729.78x = 8,921,256,041.17
  5. Step 5: Solve for x
    x = 8,921,256,041.17/104,729.78
  6. Step 6: Final answer
    x = 85,183.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.