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Finding the Fourth Proportional to 122,486.65, 183,658.45 and 47,519.20

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Solution

The fourth proportional to 122,486.65, 183,658.45 and 47,519.20 is: 71,251.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,486.65 : 183,658.45 = 47,519.20 : x
  2. Step 2: Convert to fraction form
    122,486.65/183,658.45 = 47,519.20/x
  3. Step 3: Cross multiply
    122,486.65x = 183,658.45 × 47,519.20
  4. Step 4: Simplify right side
    122,486.65x = 8,727,302,039.30
  5. Step 5: Solve for x
    x = 8,727,302,039.30/122,486.65
  6. Step 6: Final answer
    x = 71,251.05

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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.