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Finding the Fourth Proportional to 139,188.11, 208,795.59 and 39,351.56

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Solution

The fourth proportional to 139,188.11, 208,795.59 and 39,351.56 is: 59,031.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,188.11 : 208,795.59 = 39,351.56 : x
  2. Step 2: Convert to fraction form
    139,188.11/208,795.59 = 39,351.56/x
  3. Step 3: Cross multiply
    139,188.11x = 208,795.59 × 39,351.56
  4. Step 4: Simplify right side
    139,188.11x = 8,216,431,143.64
  5. Step 5: Solve for x
    x = 8,216,431,143.64/139,188.11
  6. Step 6: Final answer
    x = 59,031.13

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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.