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Finding the Fourth Proportional to 139,388.67, 209,095.97 and 39,551.31

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Solution

The fourth proportional to 139,388.67, 209,095.97 and 39,551.31 is: 59,330.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,388.67 : 209,095.97 = 39,551.31 : x
  2. Step 2: Convert to fraction form
    139,388.67/209,095.97 = 39,551.31/x
  3. Step 3: Cross multiply
    139,388.67x = 209,095.97 × 39,551.31
  4. Step 4: Simplify right side
    139,388.67x = 8,270,019,331.46
  5. Step 5: Solve for x
    x = 8,270,019,331.46/139,388.67
  6. Step 6: Final answer
    x = 59,330.64

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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.