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Finding the Fourth Proportional to 104,646.12, 156,965.70 and 45,481.86

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Solution

The fourth proportional to 104,646.12, 156,965.70 and 45,481.86 is: 68,221.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,646.12 : 156,965.70 = 45,481.86 : x
  2. Step 2: Convert to fraction form
    104,646.12/156,965.70 = 45,481.86/x
  3. Step 3: Cross multiply
    104,646.12x = 156,965.70 × 45,481.86
  4. Step 4: Simplify right side
    104,646.12x = 7,139,091,992.20
  5. Step 5: Solve for x
    x = 7,139,091,992.20/104,646.12
  6. Step 6: Final answer
    x = 68,221.28

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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.