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Finding the Fourth Proportional to 139,240.21, 208,868.37 and 39,392.04

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Solution

The fourth proportional to 139,240.21, 208,868.37 and 39,392.04 is: 59,090.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,240.21 : 208,868.37 = 39,392.04 : x
  2. Step 2: Convert to fraction form
    139,240.21/208,868.37 = 39,392.04/x
  3. Step 3: Cross multiply
    139,240.21x = 208,868.37 × 39,392.04
  4. Step 4: Simplify right side
    139,240.21x = 8,227,750,646.43
  5. Step 5: Solve for x
    x = 8,227,750,646.43/139,240.21
  6. Step 6: Final answer
    x = 59,090.34

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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.