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Finding the Fourth Proportional to 139,030.62, 208,047.70 and 120,375.10

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Solution

The fourth proportional to 139,030.62, 208,047.70 and 120,375.10 is: 180,131.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,030.62 : 208,047.70 = 120,375.10 : x
  2. Step 2: Convert to fraction form
    139,030.62/208,047.70 = 120,375.10/x
  3. Step 3: Cross multiply
    139,030.62x = 208,047.70 × 120,375.10
  4. Step 4: Simplify right side
    139,030.62x = 25,043,762,692.27
  5. Step 5: Solve for x
    x = 25,043,762,692.27/139,030.62
  6. Step 6: Final answer
    x = 180,131.27

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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.