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Finding the Fourth Proportional to 139,687.14, 209,537.63 and 39,862.05

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Solution

The fourth proportional to 139,687.14, 209,537.63 and 39,862.05 is: 59,795.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,687.14 : 209,537.63 = 39,862.05 : x
  2. Step 2: Convert to fraction form
    139,687.14/209,537.63 = 39,862.05/x
  3. Step 3: Cross multiply
    139,687.14x = 209,537.63 × 39,862.05
  4. Step 4: Simplify right side
    139,687.14x = 8,352,599,483.94
  5. Step 5: Solve for x
    x = 8,352,599,483.94/139,687.14
  6. Step 6: Final answer
    x = 59,795.05

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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.