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Finding the Fourth Proportional to 139,805.48, 209,692.52 and 38,617.92

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Solution

The fourth proportional to 139,805.48, 209,692.52 and 38,617.92 is: 57,922.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,805.48 : 209,692.52 = 38,617.92 : x
  2. Step 2: Convert to fraction form
    139,805.48/209,692.52 = 38,617.92/x
  3. Step 3: Cross multiply
    139,805.48x = 209,692.52 × 38,617.92
  4. Step 4: Simplify right side
    139,805.48x = 8,097,888,768.87
  5. Step 5: Solve for x
    x = 8,097,888,768.87/139,805.48
  6. Step 6: Final answer
    x = 57,922.54

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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.