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Finding the Fourth Proportional to 80,812.40, 121,238.04 and 25,408.40

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Solution

The fourth proportional to 80,812.40, 121,238.04 and 25,408.40 is: 38,118.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,812.40 : 121,238.04 = 25,408.40 : x
  2. Step 2: Convert to fraction form
    80,812.40/121,238.04 = 25,408.40/x
  3. Step 3: Cross multiply
    80,812.40x = 121,238.04 × 25,408.40
  4. Step 4: Simplify right side
    80,812.40x = 3,080,464,615.54
  5. Step 5: Solve for x
    x = 3,080,464,615.54/80,812.40
  6. Step 6: Final answer
    x = 38,118.71

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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.