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Finding the Fourth Proportional to 80,823.76, 121,254.72 and 25,419.76

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Solution

The fourth proportional to 80,823.76, 121,254.72 and 25,419.76 is: 38,135.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,823.76 : 121,254.72 = 25,419.76 : x
  2. Step 2: Convert to fraction form
    80,823.76/121,254.72 = 25,419.76/x
  3. Step 3: Cross multiply
    80,823.76x = 121,254.72 × 25,419.76
  4. Step 4: Simplify right side
    80,823.76x = 3,082,265,881.27
  5. Step 5: Solve for x
    x = 3,082,265,881.27/80,823.76
  6. Step 6: Final answer
    x = 38,135.64

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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.