Home / 80,306.72-120,570.42-40,890.32

Finding the Fourth Proportional to 80,306.72, 120,570.42 and 40,890.32

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Solution

The fourth proportional to 80,306.72, 120,570.42 and 40,890.32 is: 61,391.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,306.72 : 120,570.42 = 40,890.32 : x
  2. Step 2: Convert to fraction form
    80,306.72/120,570.42 = 40,890.32/x
  3. Step 3: Cross multiply
    80,306.72x = 120,570.42 × 40,890.32
  4. Step 4: Simplify right side
    80,306.72x = 4,930,163,056.33
  5. Step 5: Solve for x
    x = 4,930,163,056.33/80,306.72
  6. Step 6: Final answer
    x = 61,391.66

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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.