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Finding the Fourth Proportional to 80,940.16, 121,226.88 and 43,434.88

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Solution

The fourth proportional to 80,940.16, 121,226.88 and 43,434.88 is: 65,053.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,940.16 : 121,226.88 = 43,434.88 : x
  2. Step 2: Convert to fraction form
    80,940.16/121,226.88 = 43,434.88/x
  3. Step 3: Cross multiply
    80,940.16x = 121,226.88 × 43,434.88
  4. Step 4: Simplify right side
    80,940.16x = 5,265,474,985.57
  5. Step 5: Solve for x
    x = 5,265,474,985.57/80,940.16
  6. Step 6: Final answer
    x = 65,053.92

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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.