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Finding the Fourth Proportional to 139,119.76, 208,692.15 and 39,280.96

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Solution

The fourth proportional to 139,119.76, 208,692.15 and 39,280.96 is: 58,924.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,119.76 : 208,692.15 = 39,280.96 : x
  2. Step 2: Convert to fraction form
    139,119.76/208,692.15 = 39,280.96/x
  3. Step 3: Cross multiply
    139,119.76x = 208,692.15 × 39,280.96
  4. Step 4: Simplify right side
    139,119.76x = 8,197,627,996.46
  5. Step 5: Solve for x
    x = 8,197,627,996.46/139,119.76
  6. Step 6: Final answer
    x = 58,924.97

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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.