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Finding the Fourth Proportional to 80,956.40, 121,405.80 and 36,604.40

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Solution

The fourth proportional to 80,956.40, 121,405.80 and 36,604.40 is: 54,893.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,956.40 : 121,405.80 = 36,604.40 : x
  2. Step 2: Convert to fraction form
    80,956.40/121,405.80 = 36,604.40/x
  3. Step 3: Cross multiply
    80,956.40x = 121,405.80 × 36,604.40
  4. Step 4: Simplify right side
    80,956.40x = 4,443,986,465.52
  5. Step 5: Solve for x
    x = 4,443,986,465.52/80,956.40
  6. Step 6: Final answer
    x = 54,893.58

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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.