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Finding the Fourth Proportional to 104,378.54, 156,370.97 and 80,890.16

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Solution

The fourth proportional to 104,378.54, 156,370.97 and 80,890.16 is: 121,182.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,378.54 : 156,370.97 = 80,890.16 : x
  2. Step 2: Convert to fraction form
    104,378.54/156,370.97 = 80,890.16/x
  3. Step 3: Cross multiply
    104,378.54x = 156,370.97 × 80,890.16
  4. Step 4: Simplify right side
    104,378.54x = 12,648,872,782.66
  5. Step 5: Solve for x
    x = 12,648,872,782.66/104,378.54
  6. Step 6: Final answer
    x = 121,182.70

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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.