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Finding the Fourth Proportional to 139,783.76, 209,645.87 and 39,917.44

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Solution

The fourth proportional to 139,783.76, 209,645.87 and 39,917.44 is: 59,867.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,783.76 : 209,645.87 = 39,917.44 : x
  2. Step 2: Convert to fraction form
    139,783.76/209,645.87 = 39,917.44/x
  3. Step 3: Cross multiply
    139,783.76x = 209,645.87 × 39,917.44
  4. Step 4: Simplify right side
    139,783.76x = 8,368,526,337.18
  5. Step 5: Solve for x
    x = 8,368,526,337.18/139,783.76
  6. Step 6: Final answer
    x = 59,867.66

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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.