Home / 139,819.66-192,964.55-86,136.10

Finding the Fourth Proportional to 139,819.66, 192,964.55 and 86,136.10

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Solution

The fourth proportional to 139,819.66, 192,964.55 and 86,136.10 is: 118,876.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,819.66 : 192,964.55 = 86,136.10 : x
  2. Step 2: Convert to fraction form
    139,819.66/192,964.55 = 86,136.10/x
  3. Step 3: Cross multiply
    139,819.66x = 192,964.55 × 86,136.10
  4. Step 4: Simplify right side
    139,819.66x = 16,621,212,379.75
  5. Step 5: Solve for x
    x = 16,621,212,379.75/139,819.66
  6. Step 6: Final answer
    x = 118,876.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.