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Finding the Fourth Proportional to 80,783.67, 121,177.13 and 21,619.25

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Solution

The fourth proportional to 80,783.67, 121,177.13 and 21,619.25 is: 32,429.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,783.67 : 121,177.13 = 21,619.25 : x
  2. Step 2: Convert to fraction form
    80,783.67/121,177.13 = 21,619.25/x
  3. Step 3: Cross multiply
    80,783.67x = 121,177.13 × 21,619.25
  4. Step 4: Simplify right side
    80,783.67x = 2,619,757,953.77
  5. Step 5: Solve for x
    x = 2,619,757,953.77/80,783.67
  6. Step 6: Final answer
    x = 32,429.30

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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.