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Finding the Fourth Proportional to 80,326.92, 120,491.60 and 21,168.60

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Solution

The fourth proportional to 80,326.92, 120,491.60 and 21,168.60 is: 31,753.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,326.92 : 120,491.60 = 21,168.60 : x
  2. Step 2: Convert to fraction form
    80,326.92/120,491.60 = 21,168.60/x
  3. Step 3: Cross multiply
    80,326.92x = 120,491.60 × 21,168.60
  4. Step 4: Simplify right side
    80,326.92x = 2,550,638,483.76
  5. Step 5: Solve for x
    x = 2,550,638,483.76/80,326.92
  6. Step 6: Final answer
    x = 31,753.22

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1.5x scale

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.