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Finding the Fourth Proportional to 139,246.92, 208,878.48 and 39,398.76

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Solution

The fourth proportional to 139,246.92, 208,878.48 and 39,398.76 is: 59,100.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,246.92 : 208,878.48 = 39,398.76 : x
  2. Step 2: Convert to fraction form
    139,246.92/208,878.48 = 39,398.76/x
  3. Step 3: Cross multiply
    139,246.92x = 208,878.48 × 39,398.76
  4. Step 4: Simplify right side
    139,246.92x = 8,229,553,102.68
  5. Step 5: Solve for x
    x = 8,229,553,102.68/139,246.92
  6. Step 6: Final answer
    x = 59,100.43

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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.