Home / 80,720.35-120,913.76-47,339.89

Finding the Fourth Proportional to 80,720.35, 120,913.76 and 47,339.89

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Solution

The fourth proportional to 80,720.35, 120,913.76 and 47,339.89 is: 70,912.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,720.35 : 120,913.76 = 47,339.89 : x
  2. Step 2: Convert to fraction form
    80,720.35/120,913.76 = 47,339.89/x
  3. Step 3: Cross multiply
    80,720.35x = 120,913.76 × 47,339.89
  4. Step 4: Simplify right side
    80,720.35x = 5,724,044,594.09
  5. Step 5: Solve for x
    x = 5,724,044,594.09/80,720.35
  6. Step 6: Final answer
    x = 70,912.04

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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.