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Finding the Fourth Proportional to 104,379.64, 156,597.69 and 74,431.70

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Solution

The fourth proportional to 104,379.64, 156,597.69 and 74,431.70 is: 111,667.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,379.64 : 156,597.69 = 74,431.70 : x
  2. Step 2: Convert to fraction form
    104,379.64/156,597.69 = 74,431.70/x
  3. Step 3: Cross multiply
    104,379.64x = 156,597.69 × 74,431.70
  4. Step 4: Simplify right side
    104,379.64x = 11,655,832,282.77
  5. Step 5: Solve for x
    x = 11,655,832,282.77/104,379.64
  6. Step 6: Final answer
    x = 111,667.68

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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.