Home / 80,979.90-121,433.40-31,043.40

Finding the Fourth Proportional to 80,979.90, 121,433.40 and 31,043.40

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Solution

The fourth proportional to 80,979.90, 121,433.40 and 31,043.40 is: 46,551.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,979.90 : 121,433.40 = 31,043.40 : x
  2. Step 2: Convert to fraction form
    80,979.90/121,433.40 = 31,043.40/x
  3. Step 3: Cross multiply
    80,979.90x = 121,433.40 × 31,043.40
  4. Step 4: Simplify right side
    80,979.90x = 3,769,705,609.56
  5. Step 5: Solve for x
    x = 3,769,705,609.56/80,979.90
  6. Step 6: Final answer
    x = 46,551.13

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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.