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Finding the Fourth Proportional to 139,394.41, 209,091.78 and 38,193.32

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Solution

The fourth proportional to 139,394.41, 209,091.78 and 38,193.32 is: 57,290.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,394.41 : 209,091.78 = 38,193.32 : x
  2. Step 2: Convert to fraction form
    139,394.41/209,091.78 = 38,193.32/x
  3. Step 3: Cross multiply
    139,394.41x = 209,091.78 × 38,193.32
  4. Step 4: Simplify right side
    139,394.41x = 7,985,909,262.91
  5. Step 5: Solve for x
    x = 7,985,909,262.91/139,394.41
  6. Step 6: Final answer
    x = 57,290.03

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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.