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Finding the Fourth Proportional to 139,735.35, 209,635.56 and 39,896.91

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Solution

The fourth proportional to 139,735.35, 209,635.56 and 39,896.91 is: 59,854.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,735.35 : 209,635.56 = 39,896.91 : x
  2. Step 2: Convert to fraction form
    139,735.35/209,635.56 = 39,896.91/x
  3. Step 3: Cross multiply
    139,735.35x = 209,635.56 × 39,896.91
  4. Step 4: Simplify right side
    139,735.35x = 8,363,811,070.12
  5. Step 5: Solve for x
    x = 8,363,811,070.12/139,735.35
  6. Step 6: Final answer
    x = 59,854.65

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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.