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Finding the Fourth Proportional to 80,745, 121,121.82 and 25,345.32

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Solution

The fourth proportional to 80,745, 121,121.82 and 25,345.32 is: 38,019.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,745 : 121,121.82 = 25,345.32 : x
  2. Step 2: Convert to fraction form
    80,745/121,121.82 = 25,345.32/x
  3. Step 3: Cross multiply
    80,745x = 121,121.82 × 25,345.32
  4. Step 4: Simplify right side
    80,745x = 3,069,871,286.88
  5. Step 5: Solve for x
    x = 3,069,871,286.88/80,745
  6. Step 6: Final answer
    x = 38,019.34

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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.