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Finding the Fourth Proportional to 104,645.12, 156,964.20 and 45,480.86

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Solution

The fourth proportional to 104,645.12, 156,964.20 and 45,480.86 is: 68,219.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,645.12 : 156,964.20 = 45,480.86 : x
  2. Step 2: Convert to fraction form
    104,645.12/156,964.20 = 45,480.86/x
  3. Step 3: Cross multiply
    104,645.12x = 156,964.20 × 45,480.86
  4. Step 4: Simplify right side
    104,645.12x = 7,138,866,805.21
  5. Step 5: Solve for x
    x = 7,138,866,805.21/104,645.12
  6. Step 6: Final answer
    x = 68,219.78

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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.