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Finding the Fourth Proportional to 80,486.65, 120,691.09 and 47,217.52

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Solution

The fourth proportional to 80,486.65, 120,691.09 and 47,217.52 is: 70,803.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,486.65 : 120,691.09 = 47,217.52 : x
  2. Step 2: Convert to fraction form
    80,486.65/120,691.09 = 47,217.52/x
  3. Step 3: Cross multiply
    80,486.65x = 120,691.09 × 47,217.52
  4. Step 4: Simplify right side
    80,486.65x = 5,698,733,955.90
  5. Step 5: Solve for x
    x = 5,698,733,955.90/80,486.65
  6. Step 6: Final answer
    x = 70,803.47

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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.