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Finding the Fourth Proportional to 80,542.76, 120,804.89 and 21,383.06

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Solution

The fourth proportional to 80,542.76, 120,804.89 and 21,383.06 is: 32,072.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,542.76 : 120,804.89 = 21,383.06 : x
  2. Step 2: Convert to fraction form
    80,542.76/120,804.89 = 21,383.06/x
  3. Step 3: Cross multiply
    80,542.76x = 120,804.89 × 21,383.06
  4. Step 4: Simplify right side
    80,542.76x = 2,583,178,406.26
  5. Step 5: Solve for x
    x = 2,583,178,406.26/80,542.76
  6. Step 6: Final answer
    x = 32,072.14

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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.