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Finding the Fourth Proportional to 139,491.39, 192,519.13 and 85,075.12

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Solution

The fourth proportional to 139,491.39, 192,519.13 and 85,075.12 is: 117,416.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,491.39 : 192,519.13 = 85,075.12 : x
  2. Step 2: Convert to fraction form
    139,491.39/192,519.13 = 85,075.12/x
  3. Step 3: Cross multiply
    139,491.39x = 192,519.13 × 85,075.12
  4. Step 4: Simplify right side
    139,491.39x = 16,378,588,087.05
  5. Step 5: Solve for x
    x = 16,378,588,087.05/139,491.39
  6. Step 6: Final answer
    x = 117,416.48

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1.5x scale

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.