Home / 80,921,709.40-121,382,564.10-55,093,676.80

Finding the Fourth Proportional to 80,921,709.40, 121,382,564.10 and 55,093,676.80

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Solution

The fourth proportional to 80,921,709.40, 121,382,564.10 and 55,093,676.80 is: 82,640,515.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,921,709.40 : 121,382,564.10 = 55,093,676.80 : x
  2. Step 2: Convert to fraction form
    80,921,709.40/121,382,564.10 = 55,093,676.80/x
  3. Step 3: Cross multiply
    80,921,709.40x = 121,382,564.10 × 55,093,676.80
  4. Step 4: Simplify right side
    80,921,709.40x = 6,687,411,755,680,682
  5. Step 5: Solve for x
    x = 6,687,411,755,680,682/80,921,709.40
  6. Step 6: Final answer
    x = 82,640,515.20

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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.