Home / 80,570.20-120,855-19,780.72

Finding the Fourth Proportional to 80,570.20, 120,855 and 19,780.72

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Solution

The fourth proportional to 80,570.20, 120,855 and 19,780.72 is: 29,671.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,570.20 : 120,855 = 19,780.72 : x
  2. Step 2: Convert to fraction form
    80,570.20/120,855 = 19,780.72/x
  3. Step 3: Cross multiply
    80,570.20x = 120,855 × 19,780.72
  4. Step 4: Simplify right side
    80,570.20x = 2,390,598,915.60
  5. Step 5: Solve for x
    x = 2,390,598,915.60/80,570.20
  6. Step 6: Final answer
    x = 29,671.01

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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.